NASA and the European Space Agency launched an astronomical revolution. When the Space Shuttle Discovery roared into the sky ...

It seems crazy,” Princeton physicist Chris Chyba remarked, reflecting on the device that now sits at the center of a debate ...

The small world was found during a search for the hypothetical Planet Nine, and astronomers say the next time it will reach ...

Earth has a new neighbor that lives far, far away. Scientists from the Institute for Advanced Study's School of Natural ...

As it orbits the sun once every 25,000 years, the celestial body 2017 OF201 travels beyond the Kuiper Belt into a region ...

U.S. astronomers hunting for "Planet Nine" have instead stumbled on what appears to be a new dwarf planet in the solar system's outer reaches.

Replanting forests can help cool the planet even more than some scientists once believed, especially in the tropics. But even ...