2006-06-11 22:04:59 · 3 answers · asked by Anonymous in Science & Mathematics ➔ Astronomy & Space
Not at all. The Milky Way, Andromeda and a few other galaxies are in the "local group". The galaxies in this group orbit around each other. Just like our planets. At times some planets will be seen to recede from us and at other times they will be getting closer as all go along in their respective orbits.
2006-06-12 01:08:00 · answer #1 · answered by quntmphys238 6 · 0⤊ 0⤋
No, of course not. One way of visualizing this is to imagine ants crawling on a piece of rubber that is stretching. The ants themselves are moving randomly on the sheet. Because of the way the heet stretches and how fast the ants move, two ants that are far apart will be moving away from each other because of the stretching. But two ants that are close can be moving closer because their crawling on the sheet outweighs the stretching of the sheet.
In the same way, galaxies have their own particular motion that is added on to the overall expansion of the universe. The rate at which galaxies move apart due to the expansion is larger the farther away the galaxies are from each other. But the Andromeda Galaxy and the Milky Way are so close that their particular motion overwhelms the universal expansion.
This is one reason it was so difficult to find the overall rate of expansion for so long. We could only get good estimates of the distances to close galaxies, and the universal expansion wasn't large enough for them to measure reliably.
2006-06-12 08:18:05 · answer #2 · answered by mathematician 7 · 0⤊ 0⤋
no,it does not contradict .because they are two different galaxies.
2006-06-12 12:22:51 · answer #3 · answered by Anonymous · 0⤊ 0⤋