The problem with Pluto isn’t its planetary or nonplanetary status—it’s our insistence on declaring the world must be one or the other ...

For four years, NASA’s planet-hunting telescope photographed the light of 2.2 million stars. The data sat in public archives, ...

To date, humanity has discovered over 6,200 confirmed exoplanets, or planets outside of our solar system, according to NASA's ...

Volunteers with NASA's Backyard Worlds: Planet 9 project have essentially doubled the known number of brown dwarfs. Roughly ...

Spheroidal dwarf galaxies are small galaxies that orbit giants like the Milky Way. Though they display very diverse ...

Worlds this small and distant are thought to be too cold and have too little surface gravity to hold onto gases. But the findings suggest that icy, rocky objects in the solar system's outer reaches ar ...