Astronomers Discover a Mysterious Cosmic Clock

lasts of radiation detected every 16 days, which could help explain mysterious bursts of energy from...
Are Planets with Oceans Common in the Galaxy? It’s Likely, NASA Scientists Find

This illustration shows NASA's Cassini spacecraft flying through plumes on Enceladus in October 2015.
Stunning New Hubble Images Reveal Stars Gone Haywire

Stunning New Hubble Images Reveal Stars Gone Haywire
NASA’s IBEX Charts 11 Years of Change at Boundary to Interstellar Space

As the Sun wades through the interstellar medium, it generates a hot, dense wave like the wave at the front of a...
HOPS 383: X-rays From a Newborn Star Hint at Our Sun's Earliest Days

X-ray: NASA/CXC/Aix-Marseille University/N. Grosso et al.; Illustration: NASA/CXC/M. Weiss
A Cosmic Baby Is Discovered, and It's Brilliant

This illustration shows magnetic field lines protruding from a highly magnetic neutron star, or a dense...
A Super View of a Supergiant

A Super View of a Supergiant
Future Space Travelers May Follow Cosmic Lighthouses

An image of NICER on the exterior of the space station with one of the station’s solar panels in the background.