SUNSET: 
Starlink and the Astronomers: An Update
As Starlink satellites continue to enter low-Earth orbit — there are 360 of them now — SpaceX is working to mitigate the serious problems they pose for astronomy.
A Mysterious X-ray Signal Has Gone Missing
The absence of a mysterious X-ray signal — which could have provided evidence of dark matter — is causing as much controversy as its detection did.
The Milky Way’s Warped Tutu Twirls Every 600 Million Years
Astronomers have known for decades that our galaxy is warped. Now, they can follow the warp’s rotation as it travels around the galactic center.
Gravitational Waves Put Ruler to Neutron Stars
Scientists have combined observations of gravitational waves from a neutron star collision with nuclear theory to shed light on the size and nature of neutron stars.
What Snuffed Out Star Formation in This “Monster” Galaxy?
Astronomers have discovered a galaxy that formed five times as many stars as the Milky Way within 2 billion years after the Big Bang — but then quickly quelled any further starbirth.
Do You Love the Stars? Do Some Astronomy This Valentine's Day
Whether you're celebrating Valentine's Day or boycotting it, anyone visiting this site loves the stars. Here's a chance to participate in an effort to make sure future generations love them too.
Parker Solar Probe Releases New Details on Solar Wind
Scientists release a bevy of results from the Parker Solar Probe's first two passes near the Sun, including new details on so-called "rogue waves" in the solar wind.
First Light from the World's Largest Solar Telescope
The Daniel K. Inouye Solar Telescope has taken its first image of the Sun, a detailed view of our star's boiling gases that far surpasses what was possible before. Science operations are set to begin later this year.
SpaceX Launches Fourth Starlink Batch; Concerns Remain
Concerns about the night sky remain as the fourth batch of Starlink satellites — and the second one to be launched within the span of a month — takes flight.
Superluminous Supernova, Explained?
Some brilliant explosions at least 10 times more powerful than regular supernovae might come from a white dwarf merging with a massive companion star. But not everyone agrees on that explanation.
See Ancient “North Stars" Eclipse Each Other
The ancient pole star known as Thuban turns out to be an eclipsing binary. If you're up for a challenge, you can see the eclipses for yourself.
New Mysterious Radio Flash Pinned Down; Hundreds More Being Discovered
Recent observations have pinpointed the location of a fifth fast radio burst, shedding light on the environs that create these powerful sources.
NASA's TESS Introduces Us to Our Planetary Neighbors
NASA's TESS mission announces the results from its first year of exoplanet-hunting in the southern sky, introducing us to some of our planetary neighbors.
Gravitational Waves from Second Neutron-star Collision Observed
Scientists with the Laser Interferometer Gravitational-wave Observatory (LIGO) and Virgo collaborations have announced the detection of a second pair of neutron stars that went bump in the night.
Top 10 Astronomy News Stories of 2019
Our pick for the biggest astronomy news story of the year is the first-ever image of a black hole “shadow.” What's yours?
How Young Galaxies Grow
A pair of recent studies sheds light on some of the universe’s earliest galaxies and how they grow.
Hubble Images Comet Borisov at Perihelion
The Hubble Space Telescope imaged the interstellar comet 2I/Borisov when it came closest to the Sun before heading back out of the solar system.
New Cyclone Joins Jupiter’s South Pole Club
Stunning new images from NASA’s Juno mission reveal that a new cyclone has budged its way into the grouping at Jupiter’s south pole.
How Saturn's Moon Got Its Stripes
Astronomers have struggled to understand the origin of the parallel fractures on Saturn’s icy moon Enceladus, known as “tiger stripes,” from which water-ice spews into space. Now, a single explanation ties all the pieces together.
The Starlink Situation
Shots of the Starlink satellite train crossing the heavens are dramatic — even shocking — but they’re also a bit misleading. The real problems that Starlink and other megaconstellation satellites pose are more insidious.
