The number of sunspots peaks every 11 years, but researchers have never understood exactly why. A new model may clear things up.

What does the universe look like? Get the answer to this and other spacey questions straight from the experts in this video.

"This is a whole sequence of planets that can give us insight into the evolution of planets... It's just a gold mine."

Ever since the detection of gravitational waves, researchers have been searching for the bursts of light that may accompany the collisions that cause them.

Astronomers have discovered a new planet around a nearby star that is nine times the mass of Jupiter and more than 2,800 times the mass of Earth.

The collision between a newborn planet and a younger Jupiter could explain some suprising readings from NASA's Juno mission.

A neutron star "glitch" is giving astronomers a look at the star's interior. The event reveals that the mysterious objects have three parts inside.

Scientists used data from the Kepler space telescope to better estimate the rate of Earth-like planets near stars similar to our sun.

Creating millions of virtual universes and comparing them to observations of actual galaxies is a powerful new approach to studying galaxy formation.

Studying the light from pulsating stars can help scientists understand more about their insides and their life cycle.