Cosmology

Long thought nearly extinct, the Andromedid meteor shower staged a surprise outburst last December—and may return in 2018 and 2023

The spiral, created by a red giant's companion star, lets astronomers see when layers of the red giant were lost

The newest measurements, courtesy of NASA's Spitzer Space Telescope, come from infrared observations of distant variable stars

Astronomers have found two stellar-mass black holes in a surprising cohabitation within a cluster of Milky Way stars

Zooming in on Galaxy M87 reveals answers about the turbulent environment surrounding the invisible black hole at its center

What fuels a white dwarf's luminous nuclear detonation?

Scientists have envisioned a space-time crystal with cyclical structure in time as well as space

A pair of detectors that measure minute distortions in images of distant galaxies will probe the riddle of cosmic acceleration

NASA's Curiosity has completed its longest trek yet. The Mars rover journeyed more than 30 meters on its 29th Martian day, which ended September 5 at 2:37 A.M.

Upcoming telescope projects on Earth and in space will map out billions of stars and galaxies all around us

The matter-eating beast at the center of the Milky Way may actually account for Earth's existence and habitability

Hot stars booted out of their galactic homes may be responsible for creating the conditions that led to today's universe