SUNSET: 
Runaway Compact Galaxies?
Astronomers have discovered 195 compact elliptical galaxies, upping the known number of these weird galaxies sixfold.
Hubble Investigates Ghosts of Quasars Past
A galaxy-size blob of gas discovered eight years ago by a Dutch schoolteacher has galvanized the study of the spectral remains of once-bright quasars.
Ancient Galaxies Seen Dying Inside-Out
Astronomers have found massive galaxies 3 billion years after the Big Bang that are dying from the inside out.
Ring-Shaped Spyglass to Early Universe
A rare type of gravitational lens offers astronomers a close look at a young, dusty galaxy manufacturing hundreds of stars a year.
New Dwarf Galaxies Near Milky Way
Astronomers have found a set of new dwarf galaxy candidates near the Milky Way Galaxy, a discovery crucial to understanding dark matter.
Hubble Spots a Lensed Supernova
For the first time, astronomers are watching as a supernova’s light bends around a massive galaxy on its way to Earth.
Dusty Galaxy in the Early Universe
A small galaxy 700 million years after the universe’s birth has a dust reservoir that makes it look like a much older galaxy.
Tempest in the Teacup Galaxy
New observations of the Teacup Galaxy show that even black holes with wimpy radio jets can quench a galaxy's star formation. An unassuming nearby galaxy nicknamed The Teacup (more formally known as J1430+1339) hides a tempest inside. The supermassive black hole at this galaxy's center is chowing down furiously on…
Hubble’s Long Look at Distant Galaxies
Hubble Space Telescope observations are enlightening astronomers about the evolution of galaxies in the distant universe.
Charting the Andromeda Galaxy
The Hubble Space Telescope has turned its ultraviolet, visible-light, and near-infrared eyes to the queen of galaxies, M31, capturing the biggest and sharpest image yet of our neighbor.
Dark Galaxies Discovered in Coma Cluster
A bizarre set of galaxies in the Coma Cluster have lost most of their stars (or star-making material), making them especially rich in dark matter.
Ghostly Light From Dead Galaxies
Astronomers are peering into a galaxy cluster’s past, using Hubble’s Frontier Fields to measure the light from ghost stars cast adrift in galaxy collisions.
Mergers Create Disk Galaxies
Observations from several radio telescopes reveal that, when two galaxies merge, their progeny often have gaseous disks—a hypothesis that before now didn’t have solid observational evidence.
Citizen Scientists Probe Early Galaxies
New data collected by Galaxy Zoo show early galaxies with central bars, providing implications about how galaxies grow.
Small Galaxy Boasts Big Black Hole
Astronomers have detected a supermassive black hole in the center of a tiny galaxy — where it has no right to be.
The Quasar Main Sequence
A new diagram might link the diverse visible-light characteristics of quasars to two physical properties — essentially, their accretion rate and orientation. If the analysis holds up, it could point the way toward a long-sought unification.
Laniakea: Our Home Supercluster
Astronomers have mapped the cosmic watershed and discovered a massive supercluster that extends more than 500 million light-years and contains 100,000 large galaxies. The Milky Way sits on the edge of this humongous structure.
Building Big Elliptical Galaxies’ Cores
Astronomers are tracking down the seeds that likely grew to become today’s most massive elliptical galaxies.
Question Reopened: How do Galaxies Grow?
Evidence from observations sheds doubt on cosmic cannibalism as a source for galaxy growth, suggesting that instead galaxies grow by pulling in gas from the intergalactic medium.
Dwarf Galaxies Packed a Mighty Punch
Light from the puniest galaxies played a bigger role in shaping the early universe than previously thought.
