Astronomy

4241 readers
243 users here now

founded 3 years ago
MODERATORS
[email protected]
listing: all - local
626
20
New study suggests some exoplanets orbiting red dwarfs may be habitable after all (phys.org)
submitted 1 year ago by [email protected] to c/[email protected]
1 comments fedilink
627
19
What Happens If You Destroy A Black Hole? (www.youtube.com)
submitted 1 year ago by [email protected] to c/[email protected]
2 comments fedilink
628
8
Math Proof Draws New Boundaries Around Black Hole Formation | Quanta Magazine (www.quantamagazine.org)
submitted 1 year ago by [email protected] to c/[email protected]
0 comments fedilink
629
15
Neptune's clouds have vanished, and the sun may be to blame (video) (www.space.com)
submitted 1 year ago by [email protected] to c/[email protected]
0 comments fedilink
630
12
The ancient technology keeping space missions alive (www.bbc.com)
submitted 1 year ago by [email protected] to c/[email protected]
0 comments fedilink
631
86
The largest Black Hole compared to Our Solar System (lemm.ee)
submitted 1 year ago by [email protected] to c/[email protected]
23 comments fedilink
 
 

The largest Black Hole compared to Our Solar System

632
25
Here's what the first 5000 exoplanets have taught us (bigthink.com)
submitted 2 years ago by [email protected] to c/[email protected]
0 comments fedilink
 
 

In 1990, we only knew of the planets in our own Solar System. Today, the exoplanet count is more than 5000. Here's what we've learned.

633
63
Most planets in the Universe are orphans without parent stars (bigthink.com)
submitted 2 years ago by [email protected] to c/[email protected]
3 comments fedilink
634
14
The 13 scales that define our physical Universe (bigthink.com)
submitted 2 years ago by [email protected] to c/[email protected]
2 comments fedilink
635
23
It Takes 26 Fundamental Constants To Give Us Our Universe, But They Still Don't Give Everything (www.forbes.com)
submitted 2 years ago by [email protected] to c/[email protected]
11 comments fedilink
636
98
If it's cloudless where you live tonight, the 'Perseids' , annually recurring meteor stream, will be easy to see in the north, Polaris. (discuss.tchncs.de)
submitted 2 years ago by [email protected] to c/[email protected]
4 comments fedilink
 
 

Good chart for finding them: https://de.m.wikipedia.org/wiki/Perseiden

637
40
See 17 Years of an Exoplanet’s Orbit in One Captivating GIF (gizmodo.com)
submitted 2 years ago by [email protected] to c/[email protected]
4 comments fedilink
638
20
"Do supermassive black holes ever merge? | The Final Parsec Problem" by Dr. Becky [14min] (www.youtube.com)
submitted 2 years ago by [email protected] to c/[email protected]
2 comments fedilink
 
 

cross-posted from: https://lemm.ee/post/3819980

Citations and links to related videos on the video description.

Summary generated with claude.ai from the video transcription:

The 'final parsec problem' refers to the fact that the math predicts supermassive black holes at the centers of merging galaxies should stall at around 1 parsec separation and never actually merge. This contradicts observations suggesting supermassive black holes do merge over time. The problem arises because at around 1 parsec separation, the black holes have cleared out all stars/gas so can't lose more energy to get even closer. Gravitational waves only help below 0.01 pc. The upcoming LISA gravitational wave detector should detect mergers and help solve this problem - either the math is wrong and mergers happen, or mergers don't happen and the math is right.

639
53
"Do supermassive black holes ever merge? | The Final Parsec Problem" by Dr. Becky [14min] (www.youtube.com)
submitted 2 years ago* (last edited 2 years ago) by [email protected] to c/[email protected]
7 comments fedilink
 
 

Citations and links to related videos on the video description.

Summary generated with claude.ai from the video transcription:

The 'final parsec problem' refers to the fact that the math predicts supermassive black holes at the centers of merging galaxies should stall at around 1 parsec separation and never actually merge. This contradicts observations suggesting supermassive black holes do merge over time. The problem arises because at around 1 parsec separation, the black holes have cleared out all stars/gas so can't lose more energy to get even closer. Gravitational waves only help below 0.01 pc. The upcoming LISA gravitational wave detector should detect mergers and help solve this problem - either the math is wrong and mergers happen, or mergers don't happen and the math is right.

640
69
James Webb Space Telescope spies giant cosmic question mark in deep space (photo) (www.space.com)
submitted 2 years ago by [email protected] to c/[email protected]
7 comments fedilink
641
25
NASA’s Trio of Mini Rovers Will Team up to Explore the Moon (www.nasa.gov)
submitted 2 years ago by [email protected] to c/[email protected]
0 comments fedilink
642
10
Two intermediate polars investigated by astronomers (phys.org)
submitted 2 years ago by [email protected] to c/[email protected]
0 comments fedilink
643
34
Two supermoons in August mean double the stargazing fun (phys.org)
submitted 2 years ago by [email protected] to c/[email protected]
3 comments fedilink
644
15
The Golden Records aboard Voyager 1&2 | The 116 images NASA wants aliens to see (www.youtube.com)
submitted 2 years ago by [email protected] to c/[email protected]
8 comments fedilink
 
 

Depressing or Hopeful?

645
37
Why the Big Bang might not have been the beginning of our Universe (www.sciencefocus.com)
submitted 2 years ago by [email protected] to c/[email protected]
17 comments fedilink
646
18
The Absolute Maximums of Time and Space Relativity (coco1453.wordpress.com)
submitted 2 years ago by [email protected] to c/[email protected]
52 comments fedilink
647
117
Queen guitarist and astrophysicist Brian May to release 3D atlas of asteroid (www.theguardian.com)
submitted 2 years ago by [email protected] to c/[email protected]
3 comments fedilink
648
78
Something in space has been lighting up every 20 minutes since 1988 (arstechnica.com)
submitted 2 years ago by [email protected] to c/[email protected]
6 comments fedilink
649
14
Is the Universe 13.8 or 26.7 billion years old? (bigthink.com)
submitted 2 years ago by [email protected] to c/[email protected]
3 comments fedilink
650
55
Scientists propose Webb Telescope has detected stars powered by dark matter (gizmodo.com)
submitted 2 years ago by [email protected] to c/[email protected]
12 comments fedilink
view more: ‹ prev next ›