The official number of exoplanets—planets outside our solar system—tracked by NASA has reached 6,000. Confirmed planets are added to the count on a rolling basis by scientists from around the world, so no single planet is considered the 6,000th entry.

Finding life on Mars might be closer than we thought. NASA’s Curiosity rover has yielded promising data from the Red Planet, the space agency says.

Kepler-62f (also known by its Kepler Object of Interest designation KOI-701.04) is a super-Earth exoplanet orbiting within the habitable zone of the star Kepler-62, the outermost of five such planets discovered by NASA's Kepler spacecraft. It is located ...

Pluto was downgraded from a planet to a dwarf planet in 2006 by the International Astronomical Union. NASA Administrator Jared Isaacman has stated his support for President Trump to take action to reclassify Pluto as a planet. The main reason for Pluto's ...

A 10-year-old’s passion for Pluto has caught the attention of NASA thanks to a compelling, viral letter on social media.

NASA’s SPHEREx maps ice and organic material across the Milky Way, showing how planets begin to form in star-forming regions.

Kaela Polkinghorn sat in the darkened dome theater of Tampa’s Museum of Science and Innovation and watched eight planets huddle cozily around the sun. Pluto was not included in the group hug. The fourth grader watched the small icy world sit alone in the distance,