Galaxies

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

Quantum effects may prevent true black holes from forming and give rise instead to dense entities called black stars

The black hole has a troublesome sibling, the naked singularity. Physicists have long thought—hoped—it could never exist. But could it?

A preliminary analysis from the IceCube detector reveals more than two dozen neutrinos of unknown origin

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

Tiny, faint Leo P may point to additional galaxies hidden in our corner of the cosmos

A meteor shower and a cosmic "ring of fire" will dominate the night sky this month

A 2010 supernova, one of the brightest ever seen, has yielded conflicting interpretations

Even some of the more faithful might have wondered over the last few days whether there truly is a God

The onboard Alpha Magnetic Spectrometer has detected what is thought to be dark matter’s signature antimatter particles, but it cannot yet pin down their origin

Astronomers have found a new type of supernova, a star explosion so weak scientists dubbed it a miniature stellar blast