this post was submitted on 25 May 2024
82 points (100.0% liked)
Space
8744 readers
266 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
๐ญ Science
- [email protected]
- [email protected]
- [email protected]
- [email protected]
- [email protected]
- [email protected]
- [email protected]
- [email protected]
- [email protected]
๐ Engineering
๐ Art and Photography
Other Cool Links
founded 1 year ago
MODERATORS
you are viewing a single comment's thread
view the rest of the comments
view the rest of the comments
Dude, ofc they couldn't observe the black hole itself, that's the speed of the disc around it.
As for the rotation, even the article states 15 days. The impressive part is (with approximations) figuring out the speed of the disc (you can't just zoom in on a billon light years & measure distances).
15 days. Great. What's the circumference? Oh, they didn't give that either. "15 days" is still not a rotational velocity, it's linear.
I'm not giving these folks grief for doing near impossible measurements, I'm giving the article grief for claiming a measurement was made, and then not stating said measurement.