#gravitational lensing phenomenon

[in-sightjournal]

Ask A Genius 1061: The Hindemburg Melão Jr. Session 2, More on Dark Matter and Collapsed Matter

Scott Douglas Jacobsen: Hindemburg Melão Jr. further asks, “Regarding the answer about dark matter, the evidence suggests different properties than what would result from the collapse of baryonic or leptonic matter objects. For example: gravitational effects (produced by dark matter) are very spread out, rather than concentrated, as would be natural if it was generated from the collapses of…

[nasa]

Caution: Universe Work Ahead 🚧

We only have one universe. That’s usually plenty – it’s pretty big after all! But there are some things scientists can’t do with our real universe that they can do if they build new ones using computers.

The universes they create aren’t real, but they’re important tools to help us understand the cosmos. Two teams of scientists recently created a couple of these simulations to help us learn how our Nancy Grace Roman Space Telescope sets out to unveil the universe’s distant past and give us a glimpse of possible futures.

Caution: you are now entering a cosmic construction zone (no hard hat required)!

This simulated Roman deep field image, containing hundreds of thousands of galaxies, represents just 1.3 percent of the synthetic survey, which is itself just one percent of Roman's planned survey. The full simulation is available here. The galaxies are color coded – redder ones are farther away, and whiter ones are nearer. The simulation showcases Roman’s power to conduct large, deep surveys and study the universe statistically in ways that aren’t possible with current telescopes.

One Roman simulation is helping scientists plan how to study cosmic evolution by teaming up with other telescopes, like the Vera C. Rubin Observatory. It’s based on galaxy and dark matter models combined with real data from other telescopes. It envisions a big patch of the sky Roman will survey when it launches by 2027. Scientists are exploring the simulation to make observation plans so Roman will help us learn as much as possible. It’s a sneak peek at what we could figure out about how and why our universe has changed dramatically across cosmic epochs.

This video begins by showing the most distant galaxies in the simulated deep field image in red. As it zooms out, layers of nearer (yellow and white) galaxies are added to the frame. By studying different cosmic epochs, Roman will be able to trace the universe's expansion history, study how galaxies developed over time, and much more.

As part of the real future survey, Roman will study the structure and evolution of the universe, map dark matter – an invisible substance detectable only by seeing its gravitational effects on visible matter – and discern between the leading theories that attempt to explain why the expansion of the universe is speeding up. It will do it by traveling back in time…well, sort of.

Seeing into the past

Looking way out into space is kind of like using a time machine. That’s because the light emitted by distant galaxies takes longer to reach us than light from ones that are nearby. When we look at farther galaxies, we see the universe as it was when their light was emitted. That can help us see billions of years into the past. Comparing what the universe was like at different ages will help astronomers piece together the way it has transformed over time.

This animation shows the type of science that astronomers will be able to do with future Roman deep field observations. The gravity of intervening galaxy clusters and dark matter can lens the light from farther objects, warping their appearance as shown in the animation. By studying the distorted light, astronomers can study elusive dark matter, which can only be measured indirectly through its gravitational effects on visible matter. As a bonus, this lensing also makes it easier to see the most distant galaxies whose light they magnify.

The simulation demonstrates how Roman will see even farther back in time thanks to natural magnifying glasses in space. Huge clusters of galaxies are so massive that they warp the fabric of space-time, kind of like how a bowling ball creates a well when placed on a trampoline. When light from more distant galaxies passes close to a galaxy cluster, it follows the curved space-time and bends around the cluster. That lenses the light, producing brighter, distorted images of the farther galaxies.

Roman will be sensitive enough to use this phenomenon to see how even small masses, like clumps of dark matter, warp the appearance of distant galaxies. That will help narrow down the candidates for what dark matter could be made of.

In this simulated view of the deep cosmos, each dot represents a galaxy. The three small squares show Hubble's field of view, and each reveals a different region of the synthetic universe. Roman will be able to quickly survey an area as large as the whole zoomed-out image, which will give us a glimpse of the universe’s largest structures.

Constructing the cosmos over billions of years

A separate simulation shows what Roman might expect to see across more than 10 billion years of cosmic history. It’s based on a galaxy formation model that represents our current understanding of how the universe works. That means that Roman can put that model to the test when it delivers real observations, since astronomers can compare what they expected to see with what’s really out there.

In this side view of the simulated universe, each dot represents a galaxy whose size and brightness corresponds to its mass. Slices from different epochs illustrate how Roman will be able to view the universe across cosmic history. Astronomers will use such observations to piece together how cosmic evolution led to the web-like structure we see today.

This simulation also shows how Roman will help us learn how extremely large structures in the cosmos were constructed over time. For hundreds of millions of years after the universe was born, it was filled with a sea of charged particles that was almost completely uniform. Today, billions of years later, there are galaxies and galaxy clusters glowing in clumps along invisible threads of dark matter that extend hundreds of millions of light-years. Vast “cosmic voids” are found in between all the shining strands.

Astronomers have connected some of the dots between the universe’s early days and today, but it’s been difficult to see the big picture. Roman’s broad view of space will help us quickly see the universe’s web-like structure for the first time. That’s something that would take Hubble or Webb decades to do! Scientists will also use Roman to view different slices of the universe and piece together all the snapshots in time. We’re looking forward to learning how the cosmos grew and developed to its present state and finding clues about its ultimate fate.

This image, containing millions of simulated galaxies strewn across space and time, shows the areas Hubble (white) and Roman (yellow) can capture in a single snapshot. It would take Hubble about 85 years to map the entire region shown in the image at the same depth, but Roman could do it in just 63 days. Roman’s larger view and fast survey speeds will unveil the evolving universe in ways that have never been possible before.

Roman will explore the cosmos as no telescope ever has before, combining a panoramic view of the universe with a vantage point in space. Each picture it sends back will let us see areas that are at least a hundred times larger than our Hubble or James Webb space telescopes can see at one time. Astronomers will study them to learn more about how galaxies were constructed, dark matter, and much more.

The simulations are much more than just pretty pictures – they’re important stepping stones that forecast what we can expect to see with Roman. We’ve never had a view like Roman’s before, so having a preview helps make sure we can make the most of this incredible mission when it launches.

Learn more about the exciting science this mission will investigate on Twitter and Facebook.

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[just--space]

Gravity s Grin : Albert Einstein's general theory of relativity, published over 100 years ago, predicted the phenomenon of gravitational lensing. And that's what gives these distant galaxies such a whimsical appearance, seen through the looking glass of X-ray and optical image data from the Chandra and Hubble space telescopes. Nicknamed the Cheshire Cat galaxy group, the group's two large elliptical galaxies are suggestively framed by arcs. The arcs are optical images of distant background galaxies lensed by the foreground group's total distribution of gravitational mass. Of course, that gravitational mass is dominated by dark matter. The two large elliptical "eye" galaxies represent the brightest members of their own galaxy groups which are merging. Their relative collisional speed of nearly 1,350 kilometers/second heats gas to millions of degrees producing the X-ray glow shown in purple hues. Curiouser about galaxy group mergers? The Cheshire Cat group grins in the constellation Ursa Major, some 4.6 billion light-years away. via NASA

[i-am-darth-feanor]

Did you guys know that there was a star discovered in 2022 named Earendel?

It's the furthest star from us that is named and it's so far that due to the speed of light, we are currently observing it as it was within just a billion years from the Big Bang!

We can see it due to gravitational lensing, which is the phenomenon caused by massive objects as they warp the fabric of spacetime around them (think like you're putting something heavy onto a thin stretched rubber sheet). This magnifies the object through bending of light and allows us to see it!

I think it's wild that we can see something so far, and it is so heartwarming that these new discoveries are named after stories so beloved by so many people. It just makes me so happy!

[spacetimewithstuartgary]

Einstein’s equations collide with the mysteries of the Universe

A French-Swiss team tests the famous physicist’s predictions by calculating the distortion of time and space

Why is the expansion of our Universe accelerating? Twenty-five years after its discovery, this phenomenon remains one of the greatest scientific mysteries. Solving it involves testing the fundamental laws of physics, including Albert Einstein’s general relativity. A team from the universities of Geneva (UNIGE) and Toulouse III – Paul Sabatier  compared Einstein’s predictions with data from the Dark Energy Survey. Scientists discovered a slight discrepancy that varies with different periods in cosmic history. These results, published in Nature Communications, challenge the validity of Einstein’s theories for explaining phenomena beyond our solar system on a universal scale.

According to Albert Einstein’s theory, the Universe is deformed by matter, like a large, flexible sheet. These deformations, caused by the gravity of celestial bodies, are called ‘‘gravitational wells’’. When light passes through this irregular framework, its trajectory is bent by these wells, similar to the effect of a glass lens. However, in this case, it is gravity, not glass, that bends the light. This phenomenon is known as ‘‘gravitational lensing’’.

Observing it provides insights into the components, history, and expansion of the Universe. Its first measurement, taken during a solar eclipse in 1919, confirmed Einstein’s theory, which predicted a light deflection twice as large as that predicted by Isaac Newton. This difference arises from Einstein’s introduction of a key new element: the deformation of time, in addition to the deformation of space, to achieve the exact curvature of light.

Theory vs. Data

Are these equations still valid at the edge of the Universe? This question is being explored by many scientists seeking to quantify the density of matter in the cosmos and to understand the acceleration of its expansion. Using data from the Dark Energy Survey—a project mapping the shapes of hundreds of millions of galaxies—a team from the universities of Geneva (UNIGE) and Toulouse III – Paul Sabatier is providing new insights.

‘‘Until now, Dark Energy Survey data have been used to measure the distribution of matter in the Universe. In our study, we used this data to directly measure the distortion of time and space, enabling us to compare our findings with Einstein’s predictions,’’ says Camille Bonvin, associate professor in the Department of Theoretical Physics at the UNIGE Faculty of Science, who led the research.

A Slight Discrepancy

The Dark Energy Survey data allow scientists to look deep into space and, therefore, far into the past. The French-Swiss team analysed 100 million galaxies at four different points in the Universe’s history: 3.5, 5, 6, and 7 billion years ago. These measurements revealed how gravitational wells have evolved over time, covering more than half of the cosmos’s history.

‘‘We discovered that in the distant past — 6 and 7 billion years ago — the depth of the wells aligns well with Einstein’s predictions. However, closer to today, 3.5 and 5 billion years ago, they are slightly shallower than predicted by Einstein,’’ reveals Isaac Tutusaus, assistant astronomer at the Institute of Research in Astrophysics and Planetology (IRAP/OMP) at Université Toulouse III - Paul Sabatier and the study’s lead author.

It is also during this period, closer to today, that the expansion of the Universe began to accelerate. Therefore, the answer to two phenomena—the acceleration of the Universe and the slower growth of gravitational wells—may be the same: gravity could operate under different physical laws at large scales than those predicted by Einstein.

Challenging Einstein?

‘‘Our results show that Einstein’s predictions have an incompatibility of 3 sigma with measurements. In the language of physics, such an incompatibility threshold arouses our interest and calls for further investigations. But this incompatibility is not large enough, at this stage, to invalidate Einstein’s theory. For that to happen, we would need to reach a threshold of 5 sigma. It is therefore essential to have more precise measurements to confirm or refute these initial results, and to find out whether this theory remains valid in our Universe, at very large distances,’’ emphasizes Nastassia Grimm, postdoctoral researcher in the Department of Theoretical Physics at UNIGE and co-author of the study.

The team is preparing to analyse new data from the Euclid space telescope, launched a year ago. As Euclid observes the Universe from space, its measurements of gravitational lensing will be significantly more precise. Additionally, it is expected to observe about 1.5 billion galaxies within the six years of the mission. This will enable more accurate measurements of space-time distortions, allowing us to look further back in time and ultimately test Einstein’s equations.

IMAGE: Gravitational lensing of distant galaxies by the galaxy cluster Abell 2390, observed by the Euclid satellite. © ESA/Euclid/Euclid Consortium/NASA, image processing by J.-C. Cuillandre (CEA Paris-Saclay), G. Anselmi

[niceandaccurategoodomensanalysis]

The very first scene from Good Omens S2: Angel Crowley in the middle of the cosmic web

A guide to the creation of the universe: from Crowley Starmaker to space missions - part 2

A look at the history of our universe, following the opening scene of the second series of Good Omens.

This analysis was originally written for a very special event that took place last November, which marked a milestone in the history of astronomy! Part 1 here - Read the next part here.

II: Dark matter and dark energy

A discussion on some of universe's intrinsic components - dark matter and dark energy - and the role they play in its expansion.

Returning for a moment to the very first scene of season two, in the image posted here, we see Crowley, in his angelic version, amidst a structure resembling the meshes of a web.

This structure is called the Cosmic Web, and is a trace left by the Big Bang; it not only connects all the galaxies in the universe, but also helps to create them. The Cosmic Web is made up of filaments of hydrogen and dark matter, which we will discuss in a moment; its reticular shape is due to the interaction of gas and dark matter with gravitational forces.

The galaxies that form are also subject to gravitational attraction, which is why they coalesce into larger and larger clusters at the nodes of the cosmic web, where more filaments meet.

WHAT IS THE DARK MATTER?

Everything in our universe is composed of matter, i.e. something that occupies space and has mass. Specifically, ‘normal’ matter, the kind we deal with every day, is composed of atomic particles, i.e. protons, neutrons and electrons, and can exist in a solid, liquid, gaseous or plasma state. We can see it, we can touch it, we can measure various characteristics of it. It is obvious to us that it exists, because we touch it every day or perceive it with instruments, such as telescopes and microscopes. Above all, normal matter can absorb and reflect different frequencies of light. This is the phenomenon at the basis of our perception of colours and allows us to deduce characteristics about celestial bodies far away from us, such as their gradual receding, which has allowed us to elaborate theories on the expansion of the Universe.

Dark' matter, on the other hand, owes its name to the fact that it does not interact with light in any way: it does not reflect it, absorb it or emit it, not at levels measurable by us, at least. But we do know that it has mass and occupies space, thanks to indirect observations.

The first to suggest that galaxies might be made up of something not directly visible was the astronomer Fritz Zwicky, who in the 1930s, while observing the constellation Chioma, noticed a discrepancy between the visible mass and the mass calculated from the velocity of the galaxies within it.

Further evidence came in the 1970s from the astronomer Vera Rubin, who noticed that the stars at the edge of galaxies were moving at the same speed as those at the centre, not slower, as her calculations had suggested. Vera's hypothesis was that galaxies are literally surrounded by a halo of dark matter, so that the distribution of matter within them is uniform.

The observation of gravitational lensing under anomalous conditions also gives us clues to the presence of dark matter. Gravitational lensing occurs when a celestial body is so massive that it exerts a strong gravitational pull that can alter the trajectory of light passing close to it, bending it like an optical lens.

This phenomenon has also been observed in the vicinity of celestial bodies that would not have a mass large enough to produce it, so cosmologists believe that their true masses are far greater than those detected by telescopes.

To date, scientists estimate that the Universe is made up of only 5% normal matter and about 27% dark matter. The remaining 68% would be dark energy.

WHAT IS THE DARK ENERGY?

If we know little about dark matter, we know virtually nothing about dark energy. Its existence is purely theoretical: 'dark energy' is the name given to the force that creates a negative pressure in the universe, causing it to expand at an ever-increasing rate.

Scientists have formulated two hypotheses according to which dark energy could have both a constant density and a density that varies in time and space; it should fill empty space and interact only with the force of gravity. The most common justification among physicists and cosmologists is that it is an energy intrinsic to the physical vacuum: where one exists, the other also exists.

In the next chapter, we're going to continue exploring our Universe. Next stop: the Big Bang.

More infos at:

_ Building Blocks - NASA Science

_ Fritz Zwicky and the Existence of Dark Matter | SciHi Blog

_ Shining a Light on Dark Matter - NASA Science

_ Gravitational lens - Wikipedia

_ Dark matter - Wikipedia

_ Dark energy - Wikipedia

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[andromeda1023]

In the center of this image, taken with the NASA/ESA Hubble Space Telescope, is the galaxy cluster SDSS J1038+4849 — and it seems to be smiling.

You can make out its two orange eyes and white button nose. In the case of this “happy face”, the two eyes are very bright galaxies and the misleading smile lines are actually arcs caused by an effect known as strong gravitational lensing.

Galaxy clusters are the most massive structures in the Universe and exert such a powerful gravitational pull that they warp the spacetime around them and act as cosmic lenses which can magnify, distort and bend the light behind them. This phenomenon, crucial to many of Hubble’s discoveries, can be explained by Einstein’s theory of general relativity.

In this special case of gravitational lensing, a ring — known as an Einstein Ring — is produced from this bending of light, a consequence of the exact and symmetrical alignment of the source, lens and observer and resulting in the ring-like structure we see here.

Hubble has provided astronomers with the tools to probe these massive galaxies and model their lensing effects, allowing us to peer further into the early Universe than ever before. This object was studied by Hubble’s Wide Field and Planetary Camera 2 (WFPC2) and Wide Field Camera 3 (WFC3) as part of a survey of strong lenses.

A version of this image was entered into the Hubble’s Hidden Treasures image processing competition by contestant Judy Schmidt.

[krakenmare]

The cluster is so massive that its enormous gravitational field deflects light rays passing through it, much as an optical lens bends light to form an image. This phenomenon, called gravitational lensing, magnifies, brightens, and distorts images from faraway objects. The cluster's magnifying powers provides a powerful "zoom lens" for viewing distant galaxies that could not normally be observed with the largest telescopes. (January 11, 2000)

[jcmarchi]

Scientists find 14 new transient objects in space by peering through a galaxy “magnifying glass” - Technology Org

New Post has been published on https://thedigitalinsider.com/scientists-find-14-new-transient-objects-in-space-by-peering-through-a-galaxy-magnifying-glass-technology-org/

Scientists find 14 new transient objects in space by peering through a galaxy “magnifying glass” - Technology Org

An international team of scientists, led by University of Missouri’s Haojing Yan, used NASA’s James Webb Space Telescope (JWST) to discover 14 new transient objects during their time-lapse study of galaxy cluster MACS0416 — located about 4.3 billion light years from Earth — which they’ve dubbed as the ��Christmas Tree Galaxy Cluster.”

Image of galaxy cluster MACS0416 captured in visible light by Hubble’s ACS and WFC3 and in infrared light by Webb’s NIRCam, with compass arrows, scale bar, and color key for reference. Image credit: NASA

“Transients are objects in space, like individual stars, that appear to brighten by orders of magnitudes and then fade away suddenly,” said Yan, an associate professor in the Department of Physics and Astronomy. “These transient objects appear bright for only a short period of time and then are gone; it’s like we’re peering through a shifting magnifying glass. Right now, we have this rare chance that nature has given us to get a detailed view of individual stars that are located very far away. While we are currently only able to see the brightest ones, if we do this long enough — and frequently enough — we will be able to determine how many bright stars there are, and how massive they are.”

Using the advanced technological capabilities of the JWST, Yan and his team, including Mizzou graduate student Bangzheng Sun, confirmed what’s causing the galaxy cluster’s “flickering lights” or transients that scientists first saw years ago using NASA’s Hubble Space Telescope.

“We’re calling MACS0416 the Christmas Tree Galaxy Cluster, both because it’s so colorful and because of the flickering lights we find within it,” Yan said. “We can see so many transients in certain regions of this area because of a phenomenon known as gravitational lensing, which is magnifying galaxies behind this cluster.”

The team discovered the transients by studying four sets of images taken by JWST of the galaxy cluster over a period of 126 days, or about four months. Yan is particularly excited that two of the transients are supernovae — stars that are at the end of their lifespans — because the team can use them to study the supernovae’s host galaxies.

“The two supernovae and the other twelve extremely magnified stars are of different nature, but they are all important,” Yan said. “We have traced the change in brightness over time through their light curves, and by examining in detail how the light changes over time, we’ll eventually be able to know what kind of stars they are. More importantly, we’ll be able to understand the detailed structure of the magnifying glass and how it relates to dark matter distribution. This is a completely new view of the universe that’s been opened by JWST.”

“JWST’s PEARLS: Transients in the MACS J0416.1-2403 Field” has recently been accepted for publication in the Astrophysical Journal.

Source: University of Missouri

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[factsandstuffbyd]

Exoplanets are any planets beyond our solar system. Five most prominent methods of detection of exoplanets are radial velocity or wobble method, transit spectroscopy method, gravitational microlensing method, direct imaging method and Astrometry method.

The radial-velocity method, also known as the wobble method, is an indirect method for detecting extrasolar planets and brown dwarfs by observing Doppler shifts in the spectrum of the planet's parent star.

A transit is a phenomenon that occurs when a celestial body passes directly between another celestial body and the observer. Transit method types are transit spectroscopy, Transit timing variation and Transit duration variation. Transit method is the most prominent method of detection of exoplanets.

Gravitational Microlensing uses the "gravitational lensing" a concept proposed by Albert Einstein to detect exoplanets or extrasolar planets.

Telescopes are used to directly image the exoplanets using the direct imaging method of detecting exoplanets.

Astrometry is the technique which deals with the positions and motions of celestial objects like stars and planets.

[monterplant]

Could we turn the sun into a gigantic telescope?

Using a phenomenon known as gravitational lensing, it might be possible to use the sun as a gigantic telescope to peer deep into space. Continue reading Could we turn the sun into a gigantic telescope?

[nghoangquang]

Anatomy of a Black Hole

Black holes are among the most enigmatic objects in the cosmos, extensively studied yet not completely understood. Contrary to their name, black holes are not actual holes but rather incredibly dense concentrations of matter compressed into very small regions. The gravity near their surface, known as the event horizon, is so powerful that nothing, not even light, can escape. Unlike Earth’s or the Sun’s surface, the event horizon isn’t a physical surface but a boundary enclosing all the matter of the black hole. While there’s still much to learn about black holes, such as the nature of matter within their event horizons, scientists have gathered significant knowledge about them. Black holes do not emit or reflect light, rendering them effectively invisible to telescopes. Researchers primarily study black holes through their impact on surrounding matter: Black holes can be encircled by rings of gas and dust, known as accretion disks, which emit light across various wavelengths, including X-rays. The intense gravity of a supermassive black hole can cause stars to orbit it in specific patterns. Observations of star orbits near the Milky Way's center provided evidence of a supermassive black hole, a discovery that earned the 2020 Nobel Prize. When massive objects accelerate through space, they produce ripples in space-time known as gravitational waves, detectable by their effects on specialized instruments. Massive objects like black holes can also bend and distort light from more distant sources, a phenomenon called gravitational lensing, which helps scientists detect otherwise invisible black holes

[unitedstatesofworld]

Discovering the Mysteries of Lan Astron: A Journey Beyond the Stars

Space—the final frontier. It’s a place of endless wonder, a vast expanse where humanity’s curiosity knows no bounds. Over the centuries, countless celestial bodies have captured our imaginations, but few as intriguing as Lan Astron. Is it a distant planet, a new galaxy, or something else entirely? Well, that’s exactly what we’re here to explore. Grab your space helmet because we’re about to embark on an interstellar journey that’ll take us through the mysteries of Lan Astron. Hold on tight; it’s going to be a wild ride!

The Origins of Lan Astron

So, where does Lan Astron come from? That’s the million-dollar question. The name Lan Astron first popped up in scientific circles a few years back, sparking a flurry of speculation. Some said it was the name of a newly discovered star, while others believed it to be an undiscovered galaxy. But the truth? It’s even more mind-boggling.

The Cosmic Discovery

Lan Astron wasn’t discovered through a conventional telescope. Nope, it was detected through a method known as gravitational lensing. Imagine the universe bending light like a funhouse mirror, and voila! That’s how Lan Astron was spotted—a tiny blip that had astronomers scratching their heads. At first, it was dismissed as just another random blip, but then it reappeared, again and again, in different sectors of the sky.

A Mysterious Signature

What made Lan Astron stand out wasn’t just its odd appearance. It emitted a unique energy signature, one that didn’t match any known celestial body. This signature was so distinct that it led some scientists to believe Lan Astron could be evidence of a new type of cosmic phenomenon. Others suggested it might be a sign of advanced extraterrestrial technology—yes, the infamous “aliens” theory. But before we go all X-Files on you, let’s break down what we actually know.

Lan Astron: Planet, Star, or Something Else?

Here’s where things get really interesting. Despite its mysterious origins, Lan Astron defies simple classification. It doesn’t behave like a planet, nor does it act like a star. So, what is it?

Not Quite a Planet

For starters, Lan Astron doesn’t orbit any known star, which rules out it being a traditional planet. It’s also too small and cold to be a rogue planet, wandering the galaxy without a home. Its size and mass are still a matter of debate, but it’s clear that Lan Astron doesn’t fit into our neat little boxes.

Not Your Average Star

If it’s not a planet, could it be a star? Not quite. Lan Astron doesn’t emit light or heat the way stars do. It’s more like a dark, shadowy presence in the cosmos. Some have even suggested it might be a failed star, a celestial body that never fully ignited. However, its energy signature tells a different story, one that’s still being pieced together by astronomers.

Theories Surrounding Lan Astron

With so much mystery surrounding Lan Astron, it’s no surprise that there are plenty of theories floating around. Let’s dive into a few of the most intriguing ones.

Theory 1: A New Type of Black Hole

One of the leading theories is that Lan Astron could be a new type of black hole, one that doesn’t behave like the ones we’re familiar with. Traditional black holes are notorious for their gravitational pull, sucking in everything around them, including light. But Lan Astron doesn’t fit this mold. It’s more subtle, almost like a black hole in disguise. Could it be that we’ve discovered a new class of black holes that don’t follow the usual rules? Only time (and more research) will tell.

Theory 2: An Alien Megastructure

Now, this theory is straight out of a sci-fi novel, but it’s too intriguing to ignore. Some believe that Lan Astron could be an alien megastructure, a colossal construction built by an advanced civilization. Think of it like a Dyson Sphere—a hypothetical structure that could harness the energy of a star. While there’s no concrete evidence to support this theory, the strange energy signature of Lan Astron keeps the idea alive in the minds of both scientists and dreamers alike.

Theory 3: A Portal to Another Dimension

If you thought the alien theory was wild, buckle up for this one. There’s a fringe theory that suggests Lan Astron could be a portal to another dimension. The idea here is that the unusual energy signature and the way Lan Astron seems to “blink” in and out of existence could be evidence of interdimensional activity. While this theory is more speculative than scientific, it’s a tantalizing possibility that adds another layer of mystery to Lan Astron.

What Does Lan Astron Mean for Space Exploration?

Regardless of what Lan Astron turns out to be, its discovery has huge implications for the future of space exploration. Here’s why:

Expanding Our Knowledge of the Cosmos

Lan Astron has already expanded our understanding of the universe. It’s a reminder that there’s still so much we don’t know, and that space is full of surprises waiting to be discovered. The study of Lan Astron could lead to new breakthroughs in astrophysics, helping us unlock the secrets of the cosmos.

Inspiring Future Generations

The mystery of Lan Astron is also a powerful inspiration for future generations of scientists and explorers. Who wouldn’t want to be part of the team that finally uncovers the truth behind this cosmic enigma? As we continue to explore space, discoveries like Lan Astron fuel our imagination and drive us to reach for the stars.

Pushing the Boundaries of Technology

Finally, the study of Lan Astron could push the boundaries of our technology. To truly understand it, we may need to develop new instruments and techniques, which could, in turn, lead to advancements in other fields. Space exploration has always been a catalyst for technological innovation, and Lan Astron is no exception.

Conclusion

Lan Astron is more than just a blip in the night sky; it’s a cosmic puzzle that has the potential to revolutionize our understanding of the universe. Whether it’s a new type of black hole, an alien megastructure, or something even more extraordinary, Lan Astron challenges us to think beyond the ordinary. As we continue to explore and study this mysterious phenomenon, one thing is clear: the universe still holds many secrets, and Lan Astron is just one of them.

So, what’s next for Lan Astron? Only time will tell. But one thing’s for sure—this isn’t the last we’ve heard of it. The stars have a way of keeping us guessing, and Lan Astron is the perfect example of why the night sky will always be a source of wonder and discovery. Keep looking up; you never know what you might find!

[renovatio06]

'The early universe is nothing like we expected' according to new Images from JWST | Live Science

The Cosmic Gems is one of the most highly magnified objects in space, thanks to a phenomenon called gravitational lensing. (Image credit: ESA/Webb, NASA & CSA, L. Bradley (STScI), A. Adamo (Stockholm University) and the Cosmic Spring collaboration) Astronomers using the James Webb Space Telescope have observed five extremely dense proto-globular clusters along a hair-thin arc of glittering stars.…

[integrating-sphere]

Physical optics -Gloss meter and Colorimeter

In the development of optical instruments, physical optics is the most fundamental theoretical basis, and both the internal results of Colorimeter and gloss meter involve physical optics. Involving physical optics can enhance customers' understanding of the instrument and help customers who have purchased color difference meters and gloss meters better use the instrument and analyze data. Corpuscular theory (Newton) In this theory, light is thought to be like a group of small elastic particles. Fluctuation Theory (Huygens) It is believed that light is a wave (mechanical wave) excited by some kind of vibration. ① The Interference Phenomenon of "A" -- Young's Double Slit Interference Experiment The two beams of light have the same frequency and constant phase difference. The phenomenon appears as a central bright strip with evenly spaced alternating light and dark stripes on both sides. Explain that when the distance difference from a certain point on the screen to a double hole (double slit) is an integer multiple of the wavelength (even multiple of a half wavelength), the two waves are superposed in phase, resulting in enhanced vibration and the generation of a bright strip; The two waves are superposed inversely, and the vibrations cancel, creating a filament. Apply inspection planes, measure thickness, and enhance the transmitted light intensity of optical lenses (antireflective films) ② The diffraction phenomenon of light - single slit diffraction (or circular aperture diffraction) The conditional slit width (or aperture) can be compared to the wavelength. The phenomenon appears as the brightest and widest bright strip in the center, and the light and dark stripes (or rings in the countryside) published at unequal intervals on both sides. The difficult problem is that it is difficult to explain the straightness of light and the inability to find the propagation medium. Electromagnetic Theory (Maxwell) Think of light as an electromagnetic wave. Generation mechanisms of various electromagnetic waves The movement of free electrons in radio waves; The outer electrons of infrared, visible, and ultraviolet atoms are excited; The electrons in the inner layer of the X-ray atom are excited; γ The nucleus of a radiation atom is excited. Spectral emission spectrum of visible light - continuous spectrum, bright line spectrum; The absorption spectrum (characteristic spectrum) is difficult to explain the photoelectric effect phenomenon. Photon theory (Einstein) It is believed that light consists of discrete parts of photons, and the energy of each photon is E=h ν。 Phenomenon ①. The incident light is almost instantaneous to the photoelectron emission; ②. The incident light frequency must be greater than the limit frequency of the photocathode metal ν； ③. When ν＞ v。 The intensity of photocurrent is proportional to the intensity of incident light; ④. The maximum initial kinetic energy of the photoelectron is independent of the incident light intensity and only increases with the increase in the human beam lamp. Interpretation ①. Photon energy can be fully absorbed by electrons without the need for an energy accumulation process; ②. The surface electrons need to do at least work (escape work) h to escape against the gravitational force of the metal atomic nucleus ν； ③. Incident light intensity. More incident photons per unit time produce more photoelectrons; ④. The energy of an incident photon is only related to its frequency, and it is incident onto a metal surface, except for the purpose of escaping work. The rest is converted into the initial kinetic energy of photoelectrons. Difficult questions cannot explain the volatility of light. Wave-particle duality of light It is believed that light is a substance with electromagnetic nature, which has both wave characteristics. It also has particle properties. The motion law of a large number of photons shows volatility, and the behavior of individual photons shows particle property. Experimental basis: interference of weak light, X-ray diffraction These physical optics have applications in real life, where the theories of physical optics are embodied in color difference meters and glossmeters. The application of these theories directly determines the instrument's optical path, internal results, and data calculation methods. Portable Colorimeter/Chroma Meter is an innovation color measuring tool with powerful configuration to make color measurement easier and more professional; It support Bluetooth to connect with Android and ISO devices, Portable Colorimeter/Chroma Meter will take you into a new world of color management; It can be widely used to measure color value, color difference value and find similar color from color cards for printing industry, paint industry, textile industry, etc. Gloss meters AGM-580 are mainly used in the surface gloss measurement for paint, plastic, metal, ceramics, building materials. It conforms to the DIN67530, ISO2813, ASTM D523, JIS Z8741, BS 3900 Part D5, JJG696 standards and so on. Lisun Instruments Limited was found by LISUN GROUP in 2003. LISUN quality system has been strictly certified by ISO9001:2015. As a CIE Membership, LISUN products are designed based on CIE, IEC and other international or national standards. All products passed CE certificate and authenticated by the third party lab. Our main products are Goniophotometer, Integrating Sphere, Spectroradiometer, Surge Generator, ESD Simulator Guns, EMI Receiver, EMC Test Equipment, Electrical Safety Tester, Environmental Chamber, Temperature Chamber, Climate Chamber, Thermal Chamber, Salt Spray Test, Dust Test Chamber, Waterproof Test, RoHS Test (EDXRF), Glow Wire Test and Needle Flame Test. Please feel free to contact us if you need any support. Tech Dep: Service@Lisungroup.com, Cell/WhatsApp:+8615317907381 Sales Dep: Sales@Lisungroup.com, Cell/WhatsApp:+8618117273997 Read the full article