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.
Most Milky Way companion galaxies are newcomers to our corner of space
Data from ESA’s Gaia mission is re-writing the history of our galaxy, the Milky Way.
One in five distant galaxies remain hidden from our telescopes, camouflaged by cosmic dust
Around 10 and 20 percent of early galaxies may still remain hidden behind curtains of cosmic dust.
Supercomputing reveals fossil record of galaxy’s history
The visualization revealed information about the simulated galaxy's history.
Gamma rays detected from UFOs in several nearby galaxies
The gamma-ray discovery could advance understanding of UFOs’ role in the evolution of galaxies.
Astronomers make most distant detection yet of fluorine in a star-forming galaxy
A new discovery is shedding light on how fluorine — an element found in our bones and teeth as fluoride — is forged in...
Signs of water detected in a distant star-forming galaxy
The study marks the most distant detection of required elements for life.
Decades-old mystery of the strange shape at the center of Andromeda solved
Gravitational ‘kick’ may explain the strange shape at the center of Andromeda.
Hubble spots Intergalactic dance
A peculiar pair of interacting galaxies lie roughly 220 million light-years from Earth.
Galaxy flybys could trigger the formation of spiral arms in the larger galaxy
Galaxy flybys are as important as galaxy mergers in shaping the evolution of these galaxies.
Unusual signals emerging from the direction of the galactic center
A variable signal aligned to the heart of the Milky Way is tantalizing scientists.
First old binary star cluster discovered within our Galaxy
Evidence that NGC 1605 is composed of two open clusters.