Nola Taylor Tillman

A spacecraft orbiting the dwarf planet could use Pluto's moon Charon to make important orbital changes.

In less than 10 weeks, NASA's New Horizons spacecraft will explore the most distant target ever visited by a spacecraft. Mission team members don't know what to expect — and that's part of the fun.

The geological hotspots that surround geysers throughout the solar system are mysteriously absent on Jupiter's ocean-harboring moon Europa.

Whether Mercury formed from a single collision or multiple impacts, the iron-rich planet is probably a rare breed.

The first orphan gamma-ray burst reveals what happens after the merger of two massive stars.

The discovery of a potential exomoon could be the first step in finding worlds like "Avatar's" moon Pandora or "Star Wars'" forest moon of Endor.

Take a walk through Lockheed Martin's proposed habitat for NASA's moon-orbiting space station, which the agency plans to start building in 2022.

The TRAPPIST-1 system boasts seven rocky worlds in the habitable zone of their star. New research reveals that these worlds may be rich in volatiles such as water, as well.

In its first hundred million years, Mars could have started off close to Venus, before gravitational interactions moved it out to its present position.

Solar scientists look back on what we've learned in the year since the Great American Solar Eclipse.

NASA has met or exceeded many of the goals set by the National Academies of Sciences, Engineering and Medicine in the 2013-2022 planetary decadal survey, according to a new midterm assessment.

The globular cluster Omega Centauri hosts an estimated 10 million stars, but they may be too tightly packed to hold on to habitable planets, a new study suggests.

It turns out, exoplanets can be as sweet as a trip to the state fair: Two worlds discovered by NASA's Kepler Space Telescope have about the same density as a package of cotton candy.

A new technique that analyzes clashing observations may help solve the mystery behind the expansion of the universe.

Forty years ago, Pluto's largest moon Charon was discovered.

Studying the angles of river features on Mars helped a trio of scientists determine that the water fell from the air rather than seeping up from the ground.

IceCube Neutrino Observatory principal investigator Francis Halzen talks about how researchers worked together to track a high-energy neutrino to its source for the first time.