The four exoplanets orbit Barnard’s Star so closely that their years last only a few Earth days. They are probably rocky and, ...

Astronomers have detected four small planets orbiting Barnard’s Star, one of the closest stars to Earth, at just six ...

Voluminous clouds of cosmic dust permeate our galaxy, but only recently has software allowed detailed observations of the ...

There is a supermassive black hole at the center of nearly every big galaxy—including ours, the Milky Way (it's called ...

When we observe distant celestial objects, there is a possible catch: Is that star I am observing really as reddish as it ...

The discovery of the dwarf galaxy Andromeda XXXV --located roughly 3 million light-years away and the smallest yet found in the Andromeda system -- is forcing astronomers to rethink how galaxies ...

"They're so rare, and they're incredibly useful scientifically," said Conor O'Riordan of the Max Planck Institute for Astrophysics.

This NASA/ESA Hubble Space Telescope image of a vibrant spiral galaxy called NGC 5042 resides about 48 million light-years from Earth in the constellation Hydra (the water snake). The galaxy ...

Europe’s Euclid space telescope has detected a rare halo of bright light around a nearby galaxy. The halo, known as an ...

In 1920, astronomers Harlow Shapley and Heber Curtis held a Great Debate. Shapley argued that the spiral nebulae were small and in the Milky Way, while Curtis took a more radical position that they ...

NASA’s SPHEREx mission will survey the entire sky in 102 different “colors” of light, offering scientists an unprecedented ...