SUNSET: 
Take a Deep Look into the Milky Way Halo
New analysis shows the best view of the Milky Way halo to date, providing a window into our galaxy's future star formation.
60-second Astro News: White Dwarfs Still Burn, Black Holes Merge
This week in astronomy news, we learn that some white dwarfs still burn and image X-rays from black holes almost 12 billion light-years away.
Astro News: Planet-eating Stars and an Accidental Brown Dwarf
This week in astronomy news: A citizen scientist happens upon a weird, ancient brown dwarf and astronomers discover that Sun-like stars eat their own planets.
Watch Black Holes Grow, Galaxies Fall
Watch black holes grow and galaxies fall — astro photos and visualizations to get you through the week.
Saturn Has a Fuzzy Core, Too
New research reveals that Saturn, like Jupiter, has a “fuzzy” core that extends 60% of the way to its surface, a finding that is changing how astronomers think about giant planets.
How Black Holes Eat Reveals Their Mass
No one knows why quasars flicker — but astronomers are using these wavering beacons to "weigh" the black holes that power them.
NASA's Insight Reveals First Look Inside Mars
The Insight mission science team has used about 10 deep marsquakes to take stock of the planet's anatomy.
Lost & Found: Milky Way-size "Orphan Cloud"
Astronomers have found a giant gas cloud, likely stripped from its parent galaxy long ago, in a cluster 330 million light-years away.
Moon-size White Dwarf Is the Smallest Ever Found
Astronomers have discovered a white dwarf only slightly bigger than the Moon, making it the smallest ever found. It might even be on the edge of collapse.
Galaxies That Evolve Together But Don’t Stay Together
A study of 36 dwarf galaxies within a volume of space spanning 13 million light-years show they all have remarkably similar histories despite the vast distances between them.
The Giant Star That "Blinked"
Astronomers are trying to understand why a giant star "blinked," fading almost completely before brightening again over the course of about 200 days.
Number of Known Mysterious Radio Flashes Nearly Quadruples
The CHIME telescope has released its first catalog with 492 unique sources of fast radio bursts, the brief flashes of radio waves that have been intriguing astronomers over the past decade.
Astronomy in Pictures: Unraveling Galaxies and Clyde's Spot
This week in astronomy pictures: Peer into our galaxy's busy core, watch Clyde's Spot unravel at Jupiter, and see a stunning Hubble photo of a lopsided galaxy.
Astronomers Challenge Claim of Planet Around Barnard's Star
Astronomers thought a super-Earth might orbit nearby Barnard's star. But a new study disputes that claim, arguing that stellar activity might be masquerading as the planetary signal.
Sights and Sounds of the Solar System
Spacecraft are returning sights and sounds from Venus, Jupiter, and beyond — here's a sampling.
What’s Inside Neutron Stars?
Size measurements of two neutron stars have narrowed down what kinds of exotic matter might exist in their extremely dense cores.
Dark Matter "Wake" in the Milky Way's Outer Reaches
Astronomers have discovered that a satellite of the Milky Way has left a "wake" in the dark matter halo that surrounds our galaxy.
Proxima Centauri Releases Powerful Flare
The Sun dwarfs its nearest stellar neighbor, but Proxima Centauri's flares pack a comparatively energetic punch.
Crab Pulsar's Mystery Bursts Are Even More Powerful Than We Thought
The Crab Nebula pulsar has sporadically bursted for decades. Now, astronomers have found these mysterious bursts release even more energy than thought.
Astronomers Use AI to Investigate Quasars and Galaxies Galore
New applications of machine learning have enabled astronomers to classify 27 million galaxies and pick out a dozen rare quadruply lensed quasars.
