The star closest to the sun may harbor another planet, this one much more massive and colder than Earth.
Tiny grains of stardust that formed long before our solar system are giving new insight into star formation in the Milky Way.
A new effort to study the cosmos is named after Vera Rubin, an astronomer who searched out dark matter and battled sexism.
The Earth and sun are relatively near a newfound, wavy rope of star-forming gas, named the Radcliffe Wave.
A newly discovered star cluster in the Milky Way’s halo seems to have been deposited there by gas torn off of two satellite galaxies.
Three galaxies ionizing hydrogen 680 million years after the Big Bang show a potential step in the ionization of nearly all hydrogen in the cosmos.
The second galaxy known to host brief, brilliant flashes of radio waves known as a recurrent fast radio burst looks nothing like the first.
Gravitational waves have once again heralded a smashup between neutron stars, but this time with no flash of light to help guide understanding.
Maps of a rapidly spinning neutron star could eventually help researchers figure out how matter behaves at extraordinarily high densities.