Earth and Mars are constantly moving, but don’t stay a constant distance apart. Plus, spacecraft don’t travel in a straight line to their destination.

A new analysis of data from four instruments aboard NASA’s Cassini spacecraft has demonstrated the crucial role that Saturn’s small icy moon Enceladus plays in circulating energy and momentum around ...

Learn about HD 137010 b, a cold Earth‑sized planet candidate that sits near the outer edge of its star’s habitable zone.

Gas giants are large planets mostly composed of helium and/or hydrogen. Although these planets have dense cores, they don't ...

A huge gas giant suddenly appears in the sky. You look up in wonder. It’s beautiful. The second Saturn replaces our Moon in ...

New satellite-based analysis explains how energy carried by Alfvén waves moves from Earth’s magnetosphere into the atmosphere to generate auroral light emissions.

Jupiter, Mercury, Neptune, Saturn, Uranus, and Venus—will appear in the sky together in a special planet parade on Feb. 28.

February holds some spectacular sights in the night and morning sky. See what's happening in the skies over North Texas this ...

Mercury, Venus, Jupiter, Saturn, Uranus, and Neptune are all in the evening sky, but you’ll need binoculars, timing, and a ...

An international team of researchers has finally identified the "invisible power source" behind the light show: Alfvén waves.

Madeline Cash’s debut novel, Lost Lambs, tells the story of a modern American family: semi-estranged parents in an ill-fated ...

But unlike Jupiter, Venus does have phases, going from not illuminated at all (when it is between the Earth and the Sun) to ...