Astronomers have long speculated about an unseen planet lurking in the solar system's outer edge. This hypothetical world, ...

Previous surveys by NASA's Wide-field Infrared Survey Explorer (WISE) have ruled out any Jupiter-size planets out to 256,000 ...

Inferring planet composition from observations of clouds Gas giants like Jupiter and Saturn and ice giants like Neptune and Uranus are a major focus of current space missions and large telescopes ...

Jupiter and Mars shine in the evening, more planets gather in the morning, and the Eta Aquariid meteors join in.

The vermilion, amethyst and jade ribbons of the northern and southern lights are some of Earth’s most distinctive features.

Discover the order of planets in the solar system. From Mercury to Neptune, explore our solar system and learn more about our cosmic home. The solar system is our cosmic neighborhood, made up of ...