Register to reply

From Andromeda

by Fozzie
Tags: andromeda
Share this thread:
Jan28-12, 01:23 PM
P: 3
If an observer on the Andromeda galaxy looked back at us, how would the Milky Way galaxy look to him? Edge-on, spiral face on, or in between?
Phys.Org News Partner Astronomy news on
Smallest known galaxy with a supermassive black hole found
Mystery of rare five-hour space explosion explained
Glowing galaxies in telescopic timelapse
Jan28-12, 01:29 PM
Sci Advisor
PF Gold
marcus's Avatar
P: 23,274
It depends on whether the constellation Andromeda is in the Milkyway band of stars. As I recall, it is more or less. Therefore he would see us edge on (if that is true).

Yes. Look!

This map shows the band of the Milkyway, and it also shows a dot where the Andr. galaxy is. It is not right exactly in the band, but rather close.

It is within 15 degrees of the center of the band. 15 degrees is a fairly small angle. So he would not see us exactly edge on, but with a slight tilt of 15 degrees.
Jan28-12, 01:36 PM
Sci Advisor
PF Gold
cepheid's Avatar
P: 5,196
Andromeda (m31) is about 20 degrees below the Galactic plane. So, I assume that, looking back along that line of sight , you'd see the MW as somewhere between edge-on and face on, but closer to edge on.

Jan28-12, 02:01 PM
P: 3
From Andromeda

A bit like we see Andromeda then? Thanks!

Register to reply

Related Discussions
I don't understand - Andromeda... Cosmology 7
Andromeda Paradox General Discussion 7
Andromeda Galaxy Special & General Relativity 3
Andromeda and our galaxy Astronomy & Astrophysics 3
Galaxy was headed at us at like 100 times faster than a bullet Astronomy & Astrophysics 14