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.
Classifying tens of thousands of galaxies in just a few seconds
A task that usually takes months to accomplish.
First high-resolution image of an expanding bubble of hot plasma and ionized gas
A boiling cauldron where stars are born.
Giant comet found in the outer solar system
Estimated to be 100–200 kilometers across, the unusual wandering body will make its closest approach to the Sun in 2031.
A giant arc of galaxies discovered 9.2 billion light-years away
The discovery challenges basic assumptions about the Universe.
Astronomers discovered the largest rotation in the universe
A rotation on such enormous scales has never been seen before.
The spin of Milky Way’s galactic bar has slowed by about a quarter
The counterweight slowing this spin must be dark matter.
A census of nearly 100 galaxies in the nearby universe
Cosmic cartographers map nearby universe revealing the diversity of star-forming galaxies.
A titanic galactic wind driven by a supermassive black hole 13.1 billion years ago
Earliest gigantic black hole storm.
Study determined the effect of black holes beyond their own galaxies
There is a particular coupling between the black holes and their galaxies