A 9-billion-year--year-old star explosion may yield clues about the expansion of the universe.
Astronomers have solved the puzzle of the companion that, along with a white dwarf, causes a Type 1a supernova.
Even as the planet orbiting Beta Pictoris twists and kinks the debris disk around the star, the disk drags and distorts the orbit of the planet.
The massive planet 55 Cancri d flips itself upside-down and drags its four sibling planets along for the ride.
Refining the distance to the solar mass black hole in Cygnus X-1 allowed astronomers to precisely calculate its characteristics.
Hidden moons around Pluto could produce unforeseen hazards that could destroy NASA's New Horizons spacecraft.
The Milky Way and its neighbor, the Andromeda galaxy, seem to be slowing down their rates of star formation.
Documents reveal who cut key passages that could have trumped Edwin Hubble's discovery of the expansion of the universe.
Astronomers studying the Martian atmosphere have found up to a hundred times more water than anticipated in the upper atmosphere.
When two city-sized stars with solar-sized masses merge, the result is a high energy blast wave that lasts for months.
The process of convection, which resembles boiling water, helps astronomers to understand what's happening deep inside of a pulsating star.
The unique relationship between age and the pulsing of Cepheid variable stars allowed astronomers to determine that the star formation in the Milky Way more than tripled a few million years ago.