Space

8688 readers

30 users here now

Share & discuss informative content on: Astrophysics, Cosmology, Space Exploration, Planetary Science and Astrobiology.

Rules

Be respectful and inclusive.
No harassment, hate speech, or trolling.
Engage in constructive discussions.
Share relevant content.
Follow guidelines and moderators' instructions.
Use appropriate language and tone.
Report violations.
Foster a continuous learning environment.

Picture of the Day

The Busy Center of the Lagoon Nebula

Related Communities

🔭 Science

🚀 Engineering

🌌 Art and Photography

Other Cool Links

founded 1 year ago

MODERATORS

[email protected]

JWST Spots Giant Black Holes All Over the Early Universe (www.quantamagazine.org)

submitted 1 year ago by [email protected] to c/[email protected]

10 comments fedilink hide all child comments

Giant black holes were supposed to be bit players in the early cosmic story. But recent James Webb Space Telescope observations are finding an unexpected abundance of the beasts.

you are viewing a single comment's thread
view the rest of the comments

[–] [email protected] 1 points 1 year ago* (last edited 1 year ago) (1 children)

I thought so too but apparently the length of time it takes a black hole to evaporate is based on mass and those with a low mass — as in, the mass of the moon — should have already evaporated. Only supermassive black holes are the ones likely to take a google years to evaporate.

Edit: none of the ones pictured are that small. We probably couldn't detect them for hundreds/thousands of years (e.g. until solar system sized telescopes).

[–] [email protected] 1 points 1 year ago

According to this calculator a black hole the size of the moon would take 584,745,000,000,000,000,000,000,000,000,000,000,000,000,000 years. I'm always open to correction though. (5.84745E44)