Galaxies are astronomical objects composed of billions or even trillions of stars. Our Earth and solar system are just a tiny part of the Milky Way; it is one of countless galaxies in the universe. These immense systems are the fundamental building blocks of cosmic structure. During the universe’s 13.7 billion-year history, the first few billion years marked a golden age for galaxy formation, when galaxies actively turned their gas reservoirs into new stars. Galaxies are astronomical objects composed of billions or even trillions of stars. Our Earth and solar system are just a tiny part of the Milky Way; it is one of countless galaxies in the universe. These immense systems are the fundamental building blocks of cosmic structure. During the universe’s 13.7 billion-year history, the first few billion years marked a golden age for galaxy formation, when galaxies actively turned their gas reservoirs into new stars. Astronomy Phys.org – latest science and technology news stories
JWST unveils the mysteries of distant quiescent galaxies: Why do they stop growing?
