The Hubble Space Telescope time-lapse captured footage of Jupiter, Saturn, Uranus and Neptune. Credit: SCIENCE: NASA, ESA, ...

Using the radial velocity method, an international team of astronomers has discovered a new extrasolar planet orbiting a ...

A series of small earthquakes has been detected beneath a U.S. volcano that has been showing increasing signs of activity in ...

The photo at left is an enhanced-color image of Neptune from the Hubble Space Telescope. At the right, that image is combined ...

Almost 10 years ago, a NASA spacecraft was able to take several photos of Pluto, known for decades as a planet before it was ...

Four planets in the solar system are about to appear in alignment in the night sky. Here's how stargazers will be able to see ...

The planet’s elusive aurorae are much colder than expected, which is how they evaded detection for so long.