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astacks24.bsky.social
Angel
@astacks24.bsky.social
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astronomers.bsky.social
Caldwell 4 also called the Iris Nebula, or NGC 7023

Credit: NASA & ESA
This beautiful, blushing nebula is unique amongst its counterparts. While many of the nebulae visible in the night sky are emission nebulae — clouds of dust and gas that are hot enough to emit their own radiation and light — Caldwell 4, otherwise known as the Iris Nebula or NGC 7023, is a reflection nebula. This means that its color comes from the scattered light of its central star, which lies nestled in the abundant star fields of the constellation Cepheus. Located some 1,400 light-years away from Earth, the Iris Nebula’s glowing gaseous petals stretch roughly 6 light-years across. The Iris Nebula was discovered by German-British astronomer Sir William Herschel on October 18, 1794. (Herschel has an impressive track record, having also discovered the planet Uranus and having been knighted in 1816.) His Iris Nebula has an apparent magnitude of 7. Located near the North Celestial Pole and the North Star (Polaris), Caldwell 4 is nearly impossible to see from the Southern Hemisphere. For best viewing in the Northern Hemisphere, use a telescope in early autumn to star hop from the two brightest stars in the constellation Cepheus. Since the Iris Nebula is faint and diffuse, dark skies away from city lights are recommended for viewing it. This nebula is of particular interest to scientists because of its colors. Reflection nebulae glow because they are made up of extremely tiny particles of solid matter, up to 10 or even 100 times smaller than dust particles on Earth. These particles diffuse the light around them, giving the nebula a second-hand glow that’s typically bluish (like our sky). While the Iris Nebula appears predominantly blue, it includes large filaments of deep red, indicating the presence of an unknown chemical compound likely based on hydrocarbons. Studying nebulae like this one helps astronomers learn more about the ingredients that combine to make stars.
December 7, 2024 at 12:25 PM
astacks24.bsky.social
¿Quién? Si no yo
December 7, 2024 at 1:32 PM
astacks24.bsky.social
Just praying for better days 🙏🏻
November 26, 2024 at 3:22 PM
Reposted by Angel
redditspaceviewes.bsky.social
The Pillars of Creation taken by JWST
November 24, 2024 at 3:46 PM
astacks24.bsky.social
I’m chasing a ghost
November 22, 2024 at 11:15 PM
astacks24.bsky.social
Same shit different day
November 17, 2024 at 4:47 AM
astacks24.bsky.social
One piece 🐐
brinkofgaming.bsky.social Brink 🎮 @brinkofgaming.bsky.social · Nov 15
Updated *Get to Know Me!* This place is booming!

🌟 Zelda
⭐️ Pokémon
🌟 Skyrim
⭐️ Mario
🌟 Metroid
⭐️ Coffee
🌟 Craft beers
⭐️ Reading fantasy/horror
🌟 Metal
⭐️ Chill vibes
🌟Naruto
⭐YuYu Hakusho
🌟Chainsaw Man
⭐Dandadan
🌟One Piece
⭐Demon Slayer
🌟Dai Dark
⭐Delicious in Dungeon
🌟Princess Mononoke
November 16, 2024 at 4:49 AM
astacks24.bsky.social
It’s refreshing to not see these sex bots/elon and ads everywhere
November 16, 2024 at 4:30 AM
astacks24.bsky.social
November 16, 2024 at 3:39 AM
Reposted by Angel
waltdenver.bsky.social
NBA: The NBA Cup tournament floors will be less extreme this year

New Orleans:
November 16, 2024 at 1:12 AM
astacks24.bsky.social
If you need to make a hard decision just flip a coin. When it's in the air, you'll know which side you're hoping for.
November 15, 2024 at 10:19 PM
Reposted by Angel
unbotheredmike.bsky.social
If Mike Tyson get knocked out tomorrow can we all agree to act like it didn’t happen?
November 15, 2024 at 1:34 AM
astacks24.bsky.social
Shy guy all day
trouzrschnauzer.bsky.social DJ Trooz 🎶Music Comms Open🎶 @trouzrschnauzer.bsky.social · Nov 14
Goodnight meme post!
Btw, I'm a Yoshi main 😎
November 15, 2024 at 4:53 AM
Reposted by Angel
itsjwills.bsky.social
Once we get Shams and post notification settings it’s over for NBA Twitter
a man in a toronto raptors jersey is standing on a basketball court with a crowd in the background .
ALT: a man in a toronto raptors jersey is standing on a basketball court with a crowd in the background .
media.tenor.com
November 14, 2024 at 5:58 PM
astacks24.bsky.social
🐐🇧🇷
90sfootball.com 90s Football @90sfootball.com · Nov 14
The R9 show 🇧🇷
November 15, 2024 at 4:07 AM
Reposted by Angel
smnllyd5.bsky.social
November 14, 2024 at 7:10 PM