Puzzling observation about Milky Way, deep space galaxies' rotations. (www.techexplorist.com)

submitted 11 months ago by pranjalmalewar@lemmy.world to c/space@lemmy.world

5 comments fedilink hide all child comments

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

[-] Peasley@lemmy.world 7 points 11 months ago* (last edited 11 months ago)

, but according to Shamir, there are two possible explanations:

“One explanation is that the universe was born rotating. That explanation agrees with theories such as black hole cosmology, which postulates that the entire universe is the interior of a black hole. But if the universe was indeed born rotating, it means that the existing theories about the cosmos are incomplete.”

The article never gets to the second explanation. What am i missing here?

[-] Num10ck@lemmy.world 8 points 11 months ago

Possible Explanations:

Shamir proposes two main explanations for this unexpected pattern:
- A Rotating Universe: The universe itself might have been born rotating, which could explain the observed asymmetry.
- Observational Bias: Earth's motion around the Milky Way's center might create a Doppler shift effect, making galaxies rotating in the opposite direction appear brighter and more detectable, potentially creating an observational bias.

[-] Peasley@lemmy.world 2 points 11 months ago* (last edited 11 months ago)

Thanks! The article never mentions the direction of the MW's spin, so the bias section reads pretty roughly. If the reader knows that going in then it makes perfect sense:

MW spins counter-clockwise
Most observed galaxies spin clockwise
Doppler effect would make galaxies spinning the opposite direction of Milky Way appear slightly brighter to us,

which suggests observation bias as a possible explanation. I only got 2/3.

A strategic "also" in "This could explain why such galaxies seem more common in telescope observations." would have helped as well.

this post was submitted on 24 Mar 2025

21 points (100.0% liked)

[Dormant] moved to !space@mander.xyz

11382 readers

1 users here now

This community is dormant, please find us at !space@mander.xyz

You can find the original sidebar contents below:

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