2007-10-24 09:07:28 · 5 answers · asked by spencer 2 in Science & Mathematics ➔ Astronomy & Space
Next time you someone throws a ball at you, watch it closely. It will have a blue doppler shift. It may be small, but it will be there.
Anything coming towards you will be shifted to the blue. We are heading towards the Andromeda galaxy so it will shift blue.
But the universe is expanding and the farther you look away from here, the more likely that what you are looking at is heading away from you, thus it has a red shift.
2007-10-24 09:21:05 · answer #1 · answered by Frst Grade Rocks! Ω 7 · 3⤊ 0⤋
Not true. There are a total of 8 galaxies currently moving towards us, the most notable is the Andromeda galaxy. All 8 are within the 'local group', a group of about 250 galaxies that are bound by gravity.
2007-10-24 09:32:09 · answer #2 · answered by quantumclaustrophobe 7 · 2⤊ 0⤋
The Andromeda Galaxy is undergoing blue shift at 300 kilometers per second. So I'll have to say no.
2007-10-24 09:32:03 · answer #3 · answered by Tony 2 · 2⤊ 0⤋
That is not correct.
All light from Andromeda is blue shifted because in a few billion years the milky Way and Andromeda galaxy will collide.
All other galaxies are red shifted.
2007-10-24 09:19:25 · answer #4 · answered by Greg P 5 · 2⤊ 1⤋
Certainly not true. For example, some stars are moving approximately towards us, and therefore have a (small) blue shift.
The statement may perhaps be true of very distant objects, for which the universal expansion pre-dominates over local motions.
2007-10-24 09:20:47 · answer #5 · answered by James P 5 · 3⤊ 0⤋