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Galaxy

A galaxy is any of the systems of stars and interstellar matter that make up the universe. A galaxy is composed of stars, stellar remnants, interstellar gas, dust, and dark matter that are all held together by gravity.
Nature has provided an immensely varied array of galaxies, ranging from faint, diffuse dwarf objects to brilliant spiral-shaped giants.

Astrophysicists traced the violent journeys of stars orbiting our galaxy’s central black hole

Space
Stellar collisions produce strange, zombie-like survivors.

Universe’s Expansion History: Insights from the DESI Survey

Space
The DESI survey has observed a new set of 5000 galaxies every 20 minutes since its launch in 2021.

NASA’s James Webb Telescope Probes Starburst Galaxy Messier 82

Space
Amid a galaxy teeming with new and young stars lies an intricate substructure.

A large black hole that “hiccups,” giving off plumes of gas

Space
Persistent “hiccups” in a far-off galaxy draw astronomers to new black hole behavior.

Strong magnetic fields spiraling at the edge of the Milky Way’s central black hole

Space
Strong magnetic fields may be common to all black holes

An obscure class of galaxies briefly awakens sleeping supermassive black holes

Space
Radio observations of Compact Symmetric Objects (CSOs) provide new clues about their origins.

Blue supergiant stars can be formed by the merger of two stars

Space
Strong evidence that most blue supergiants may have formed from the merger of two stars.

Ancient threads of the Milky Way galaxy unveiled

Space
Truly ancient fragments.

Largest-ever map of the universe’s active supermassive black holes

Space
New “quasar catalog” serves as a 3D history book of the universe.

Our universe has no dark matter, study

Space
Study challenges the current model of the universe.

Rethinking galactic origins: Heavy-element mapping challenges conventional theory

Space
Challenging a 20-year-old theory.

Scientists unprecedentedly detailed observations of one of the earliest known galaxies

Space
Growth in the early Universe was much faster than first thought.
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