it changes overtime with constant movement and change in rotation
Pen15 thats what.
Galaxies change very slowly.
the universe is constantly expanding, new stars and galaxies are coming into existence, and old stars are dying.
Which ones are visible at what time of day does. The galaxies themselves don't.
Cluster's form because gravity gradually builds a center of mass which over time accumulates more and more matter which can explain the formation of galaxies as well as globular clusters.
No. Galaxies vary greatly in size, mass, shape, and number of stars.
We have no idea. Every time we invent a better telescope, we discover that there are 100 times more galaxies than we previously believed. There is no expectation that this will change any time soon.
The theory of evolution by natural selection. It explains evolution; the change in allele frequency over time in a population of organisms. Why organisms change over time in differing environments.
How have valleys change over time?How have valleys change over time?How have valleys change over time?
Astronomers can watch galaxies that are far away. Since the light takes billions of years to reach us from the farthest known galaxies, they would be watching galaxies in the early Universe. It turns out, from such observations, that the Universe is changing.
History is the analysis of the human past that enables us to study continuity and change over time. It is an act of both investigation and imagination that seeks to explain how people have changed over time.
How did the dirction of the moon change over time? How did the dirction of the moon change over time?