#Astrophotography

[without-ado]

meteor and the stars l man_ten_bo_shi

[phoenixiancrystallist]

Here's an article about the nebula, straight from NASA!

Here it is for NASA's Astronomy Picture of the Day in 2017!

And another one from 2019!

Here's the Wikipedia article about the nebula!

Space is cool, go learn you a thing about space :3

[spacewonder19]

Cygnus Shell Supernova Remnant W63 ©

[world-beauty]

Stars, Gas, and Dust Battle in the Carina Nebula

Credits: Bastien Foucher

[rhiannatruex]

Comet A3 (Tsuchinshan-ATLAS)

[theofficialastronomy101]

Welcome to the rocky surface of PLUTO

[missedmilemarkers]

Moon 11.19.2024

Lakewood colorado

[siffriel]

(You’re lost among the vast sea of stars before you)

(Bright spots among a lightless void.)

(They’re nothing but a stale reminder of what once was)

HAPPY ANNIVERSARY ISAT! Took these photos last new moon, been waiting way too long to share these. They weren’t originally for the anniversary but i figured there wasn’t a better time to show my love of this wonderful game. Please go play it if you haven’t. The impact its had on my life this year is deserving of its own write up, thank you Adrienene for making and sharing this game with us

[quiltofstars]

The String of Pearls Galaxy, C72 // Dean Carr

This beautiful edge-on galaxy is classified as a Magellanic-type galaxy. Galaxies of this class have a single spiral arm and are intermediate between irregular galaxies and dwarf spiral galaxies. As this suggests, C72 is very similar to the Large Magellanic Cloud, but is slightly smaller at 68,000 light years across and edge-on.

[junipersplace]

So vividly beautiful! ~ Juniper 🪻

Full Moon over the Temple of Poseidon l Lolos Marios

[elixir]

Venus nightside Synthesized False Color Image By IR2 — 2016

[spacewonder19]

Night Side of Pluto (1/2)

[world-beauty]

NGC 602 and Beyond

[mysticstronomy]

IS TIME TRAVEL POSSIBLE??

Blog#455

Wednesday, November 20th, 2024

Welcome back,

In the movies, time travelers typically step inside a machine and—poof—disappear. They then reappear instantaneously among cowboys, knights or dinosaurs. What these films show is basically time teleportation.

Scientists don’t think this conception is likely in the real world, but they also don’t relegate time travel to the crackpot realm. In fact, the laws of physics might allow chronological hopping, but the devil is in the details.

Time traveling to the near future is easy: you’re doing it right now at a rate of one second per second, and physicists say that rate can change. According to Einstein’s special theory of relativity, time’s flow depends on how fast you’re moving. The quicker you travel, the slower seconds pass. And according to Einstein’s general theory of relativity, gravity also affects clocks: the more forceful the gravity nearby, the slower time goes.

“Near massive bodies—near the surface of neutron stars or even at the surface of the Earth, although it’s a tiny effect—time runs slower than it does far away,” says Dave Goldberg, a cosmologist at Drexel University.

If a person were to hang out near the edge of a black hole, where gravity is prodigious, Goldberg says, only a few hours might pass for them while 1,000 years went by for someone on Earth. If the person who was near the black hole returned to this planet, they would have effectively traveled to the future. “That is a real effect,” he says. “That is completely uncontroversial.”

Going backward in time gets thorny, though (thornier than getting ripped to shreds inside a black hole). Scientists have come up with a few ways it might be possible, and they have been aware of time travel paradoxes in general relativity for decades.

Fabio Costa, a physicist at the Nordic Institute for Theoretical Physics, notes that an early solution with time travel began with a scenario written in the 1920s. That idea involved massive long cylinder that spun fast in the manner of straw rolled between your palms and that twisted spacetime along with it. The understanding that this object could act as a time machine allowing one to travel to the past only happened in the 1970s, a few decades after scientists had discovered a phenomenon called “closed timelike curves.”

“A closed timelike curve describes the trajectory of a hypothetical observer that, while always traveling forward in time from their own perspective, at some point finds themselves at the same place and time where they started, creating a loop,” Costa says. “This is possible in a region of spacetime that, warped by gravity, loops into itself.”

“Einstein read [about closed timelike curves] and was very disturbed by this idea,” he adds. The phenomenon nevertheless spurred later research.

Science began to take time travel seriously in the 1980s. In 1990, for instance, Russian physicist Igor Novikov and American physicist Kip Thorne collaborated on a research paper about closed time-like curves. “They started to study not only how one could try to build a time machine but also how it would work,” Costa says.

Originally published on https://www.scientificamerican.com

COMING UP!!

(Saturday, November 23rd, 2024)

"CAN GRAVITY FORM WAVES??"

[sitting-on-me-bum]

The Garlic Pop Nebula

By Devesh Pande

The Indian Astrophotographer Of The Year 2023