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16 Αυγ 2024 · In the billions of years since, stars, galaxies, and clusters of galaxies have formed and re-formed—eventually yielding our home galaxy, the Milky Way, and our cosmic home, the solar system.
Hubble Deep Field - The first significant look back to the era of the universe when early galaxies were forming. The image is a long exposure of a very small area of the sky, which revealed a large number of very faint, and previously unseen, objects.
The study of galaxy formation and evolution is concerned with the processes that formed a heterogeneous universe from a homogeneous beginning, the formation of the first galaxies, the way galaxies change over time, and the processes that have generated the variety of structures observed in nearby galaxies.
21 Μαΐ 2013 · The universe of 100 years ago was simple: eternal, unchanging, consisting of a single galaxy, containing a few million visible stars. The picture today is more complete and much richer.
Astronomers know that some of the oldest galaxies observed formed when the universe was only about a billion years old. They think those galaxies started to grow around pockets of space that were slightly denser than their surroundings, an effect created by cosmic inflation when the universe began.
If galaxies are moving away from us, reasoned Hubble, then at some time in the past, they must have been clustered close together. Hubble’s discovery was the first observational support for Georges Lemaître’s Big Bang theory of the universe, proposed in 1927.
These black holes may be the seeds of the supermassive black holes we now find in the center of large galaxies, including the Milky Way. Studies into the Early Universe can provide meaningful insight into our origins, and scientists at the Center for Astrophysics are leading the way.
