Donated Spy Satellite Could Be Used for Dark Energy and Exoplanet Mission
One of two donated National Reconnaissance Office telescopes could help NASA explore space while easing budget woes, according to the American Astronomical Society
If the Universe Is Expanding, Why Are the Milky Way and Andromeda Galaxies on a Collision Course? [Video]
Caleb Scharf, director of astrobiology at Columbia University, answers questions submitted to our YouTube Spacelab Channel
A New NASA Mission Propels Detailed Investigations of Nearby Exoplanets
A new mission propels detailed investigations of exoplanets
Faint Portraits of First Galaxies Shed Light on Cosmic Dawn
The Hubble Space Telescope is giving astronomers a glimpse into the universe's early tumultuous era of galaxy formation
Rare View of Ancient Galaxy Crash Revealed
Astronomers caught a glimpse of two star-forming galaxies as they collided 11 billion light-years away. The smashup could eventually produce one giant elliptical galaxy, researchers say
Naked Singularities
The black hole has a troublesome sibling, the naked singularity. Physicists have long thought—hoped—it could never exist. But could it?
Infinity's Edge
Black Stars, Not Holes
Quantum effects may prevent true black holes from forming and give rise instead to dense entities called black stars
Antarctic Neutrino Observatory Detects Unexplained High-Energy Particles
A preliminary analysis from the IceCube detector reveals more than two dozen neutrinos of unknown origin
Milky Way Makes Small Massive Gain
Based on the Milky Way's effect on the motion of a nearby dwarf galaxy, our galaxy seems to have more mass than we previously thought. John Matson reports
Astronomers Discover New Neighbor Galaxy to the Milky Way
Tiny, faint Leo P may point to additional galaxies hidden in our corner of the cosmos
Meteor Shower and Eclipses of Sun to Grace May Sky
A meteor shower and a cosmic "ring of fire" will dominate the night sky this month