Galaxies like our Milky Way grew through cascading mergers of smaller galaxies that began billions of years ago. The ancient ...

Nearly 4.5 million years ago, two large, hot stars brushed tantalizingly close to Earth's sun. They left behind a trace in ...

Hubble Space Telescope observations of white dwarf star G238-44 has shown that it is "consuming both rocky-metallic and icy ...

A study of supernova remnant SNR 0519-69.0 using the Chandra X-ray telescope, Hubble and more has narrowed down its age to ...

CAPE CANAVERAL, Fla. (AP) — A telescope in Chile has captured a stunning new picture of a grand and graceful cosmic butterfly ...

Astronomers observed a white dwarf and subdwarf 4,000 light-years away, spiralling toward collision, testing Einstein's ...

The Gemini South telescope in Chile captured this stunning view of NGC 6302, highlighting the nebula’s intricate structure ...

A new study casts doubt on the universe’s accelerating expansion, suggesting dark energy might be weakening over time.

Imaging shows NGC 6789 building stars in near-total isolation, pushing scientists to rethink gas supply and formation in dwarf galaxies.

Astronomers using the Hubble Space Telescope have discovered a "ultra-massive white dwarf that formed when a white dwarf merged with another star," according to the Goddard Space Flight Center. Credit ...

In an ancient star system expected to be stable and dormant, scientists found a 3 billion-year-old white dwarf star still tearing apart massive quantities of rock. “The rate we’ve seen rock consumed ...