#Astronomy & Physics

[deafeningcreationearthquake]

[deathricedrawn]

i'm ready to try

[hamletthedane]

Okay be honest, because I feel really dumb right now:

(Like, am I the only one who thought it was like -80F/-60C daytime range???)

[moonstoast]

can you hear the music?

[nasa]

Black Hole Friday Deals!

Get these deals before they are sucked into a black hole and gone forever! This “Black Hole Friday,” we have some cosmic savings that are sure to be out of this world.

Your classic black holes — the ultimate storage solution.

Galactic 5-for-1 special! Learn more about Stephan’s Quintet.

Limited-time offer game DLC! Try your hand at the Roman Space Observer Video Game, Black Hole edition, available this weekend only.

Standard candles: Exploding stars that are reliably bright. Multi-functional — can be used to measure distances in space!

Feed the black hole in your stomach. Spaghettification’s on the menu.

Act quickly before the stars in this widow system are gone!

Add some planets to your solar system! Grab our Exoplanet Bundle.

Get ready to ride this (gravitational) wave before this Black Hole Merger ends!

Be the center of attention in this stylish accretion disk skirt. Made of 100% recycled cosmic material.

Should you ever travel to a black hole? No. But if you do, here’s a free guide to make your trip as safe* as possible. *Note: black holes are never safe. 

Make sure to follow us on Tumblr for your regular dose of space!

[mintiestcrystal]

i find it so unfair that i cant do all the science. like what do you MEAN I can't study bio and chem and biochem and atrophysics and physics and geology and climate science. what do you MEAN i have a limited lifespan and need to get out of school at some point to get a job. i want to collect the science fields like pokemon, this isn't fair

[mindblowingscience]

Astronomers have discovered a new planetary oddball beyond the solar system that is as fluffy and light as cotton candy.  The extrasolar planet or "exoplanet" named WASP-193 b is around 1.5 times the width of Jupiter but has just over a tenth of the solar system gas giant's mass. This makes it the second-lightest planet in the exoplanet catalog, which contains over 5,400 entries. Only the Neptune-like world, Kepler 51 d, is lighter than WASP-193 b. Located around 1,200 light-years from Earth, WASP-193 b orbits its star at a distance of around 6.3 million miles, which is about 0.07 times the distance between Earth and the sun. That means it completes an orbit of its sun-like star, WASP-193, in just 6.2 Earth days.

Continue Reading.

[wonders-of-the-cosmos]

Red sprites formed above thunderstorms in the southeast Aegean Sea, as captured from the eastern suburbs of Athens, Greece on December 4, 2021.

Credits: Copyright Thanasis Papathanasiou

[quantummechanics]

Saturn has 83 moons. 63 moons are confirmed and named, and another 20 moons are awaiting confirmation of discovery and official naming.

This is their dynamic visualization while they travel with Saturn through space

[ravings-of-a-mad-scientist]

Math

Geologist: I do more math than you might think

Chemist: I mean, chemical equations are basically mathematical equations. If you think about it (I also do math math)

Physicist: Oh, yeah, it’s all math but we just handwave it

Mathematician: YOU DO WHAT!?

Quantum Physicist: *regularly does math that is literally beyond human comprehension* *now resides in a higher plane of existence*

Engineer: If I don’t do this math correctly PEOPLE WILL DIE

Military Scientist: If I don’t do this math correctly PEOPLE WILL SURVIVE

Topologist: If I don’t do this math correctly PEOPLE WILL BE MOSTLY UNAFFECTED

Philosopher: But what even IS math, really? No seriously, what is it?

Organic Chemist: I kinda forgot how to do math, to be honest

Biologist: I literally only chose this field so I wouldn’t have to do as much math. I love stamp collecting

Biostatistician: wtf

[thequid]

Letssss gooooooo !!!!!!!! 🥳🥳🥳🥳🥳🥳

INDIA HAS DONE IT.👑😎

India became the first nation to successfully land a spacecraft near the south pole of the FRICKING MOOON!!!!!

🎉🎉🎉

🪩

India creates history and this calls for a celebration.

India is on da moon!!!!!

🎊🎊

🎆🎇🎇

[pangeen]

" Jupiter the most badass planet in the Solar System... It is the largest & the oldest planet in the Solar System. It has 79 moons, some of which are even larger than planet Mercury! It is large enough to fit 1300 Earths. It is covered with giant storms some of which are even larger than Earth! jupiter is called a 'Failed Star If it had enough mass, its core could've sustained nuclear fusion like the Sun. And most importantly.. lts gravity protects Earth from asteroids & comets & also helps stabilize the Solar System"

//© Quantum Royco

[cal-1maf]

Before we get into black holes, there are a few myths about them that deserve to be addressed.

First off, they don’t “suck stuff in.” They exert gravity on objects the same as anything else with mass. In fact, if our sun were to be magically replaced, instantly, with a black hole of equal mass, our orbit around it wouldn’t change at all! 

Second, that they’re black because their gravitational pull is so large that not even light can escape. This one’s more complicated. Around the singularity, there is a region of space where an observer cannot see “in”, which is called the event horizon. If you’re curious, this region’s size is defined by the black hole’s “Schwarzchild Radius” (Rs), which is defined by the equation Rs = 2GM / (c^2) where G is the gravitational constant, M is the mass of the black hole, and c is the speed of light.

In simple terms, let’s say we send an astronaut into the black hole. As they approach the event horizon, they experience time passing normally. From their perspective, they fall toward the black hole, through the event horizon, and observe whatever is happening beyond it. But from our perspective as an observer, the astronaut appears to slow down. Gravity affects spacetime, and the farther down a gravity well one goes, the slower time moves. This is actually something that GPS satellites need to account for, because this difference is observably present even for Earth’s gravity!

So as observers, the astronaut’s progress continues to slow as they approach the event horizon, to the point that their progress appears to just stop when they arrive at the edge of it. This is where the astronaut will appear to be, forever…if we could still see them. Light is also affected: it appears to slow down too and its frequency decreases. This decrease of its frequency is called redshift, and as the light approaches the event horizon it redshifts out of observable frequencies. So the astronaut, and the light with which we’d observe them, disappear without ever passing the event horizon from our perspective as observers. Remember, from the astronaut’s perspective they’re moving as normal and they pass through the event horizon just fine. So while, yes light can’t escape the event horizon, we’d never see it pass into it in the first place, and that’s why black holes appear black.

The last misconception, which I’m guilty of spreading in my last post, is that all black holes are infinitely dense. This is true in some cases, but supermassive black holes can actually have very low density! When I can find a satisfying answer as to why, I will be sure to share it lol.

This has become another one of my Very Long Posts, so if you would rather absorb this information in video or audio format, PBS Space Time has an excellent video here which I found very helpful in my understanding. All the material I’ve covered in this post is in this video, actually.

[beauty-funny-trippy]

The Veil nebula is the remains of a massive star that exploded as a supernova roughly 10,000 years ago. (NASA/Hubble image)

[marinotcurie]

january this january that

[uncontrolledfission]

Time Spiral, 2024-07-01

What's happened since the universe started? The time spiral shown here features a few notable highlights. At the spiral's center is the Big Bang, the place where time, as we know it, began about 13.8 billion years ago. Within a few billion years atoms formed, then stars formed from atoms, galaxies formed from stars and gas, our Sun formed, soon followed by our Earth, about 4.6 billion years ago. Life on Earth begins about 3.8 billion years ago, followed by cells, then photosynthesis within a billion years. About 1.7 billion years ago, multicellular life on Earth began to flourish. Fish began to swim about 500 million years ago, and mammals because walking on land about 200 million years ago. Humans first appeared only about 6 million years ago, and made the first cities only about 10,000 years ago. The time spiral illustrated stops there, but human spaceflight might be added, which started only 75 years ago, and useful artificial intelligence began to take hold within only the past few years.

Credits: NASA's 'Astronomy Picture Of The Day.'