In cosmology, 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.

2022年7月13日 · Here are some of the most promising theories of how galaxies form, how and why they merge, as well as the different varieties of galaxies that have been observed. As the universe expanded in size...

Galaxies are home to most of the stars in the universe, and they form the beads of the cosmic jewelry that defines structure on the largest scales. But galaxies haven’t always been around, and they have changed over the universe’s 13.8 billion-year history.

2024年10月22日 · Each galaxy deforms in reaction to the gravitational pull of its partner. Astronomers think the Milky Way and its galactic neighbor Andromeda are set to collide in another 4.5 billion years. This image, taken by the Hubble Space Telescope, shows NGC 6052, the result of two galaxies that collided and are now in the process of merging.

2014年5月13日 · Using supercomputers, scientists can look back in time and simulate how a galaxy may have formed in the early universe and grown into what we see today. Galaxies are thought to begin as small clouds of stars and dust swirling through space.

2019年6月7日 · The field of galaxy formation and evolution synthesizes the physics of baryons and dark matter to describe the origin of systems such as the Milky Way and the enormous diversity of the galaxy...

2022年4月11日 · There have been two main types of galaxy formation models to explain all those observations. The first asserts that massive elliptical galaxies formed in a single, rapid collapse of gas and dark matter, during which virtually all the gas was turned quickly into stars. Afterward the galaxies changed only slowly as the stars evolved.

The key to decipher galaxy formation and evolution is to understand the complex physical processes driving the evolution of ordinary matter during its gravitational interplay with dark matter halos across cosmic time.

6 天之前 · The galaxy is so far from Earth that we're observing it as it appeared just 330 million years after the Big Bang. ... "This result was totally unexpected by theories of early galaxy formation and ...

2025年3月26日 · a, The formation of galaxies in the early Universe heated up neutral hydrogen gas, creating expanding and coalescing ‘bubbles’ of ionized gas around them that were transparent to ultraviolet ...