An object eight times the mass of Jupiter may have swooped around the sun, coming superclose to Mars' present-day orbit ...

Stargazers will be treated to a dazzling six-planet "alignment" this January.

NASA's IMAP mission will delve into the mysteries of the heliosphere, mapping its boundaries and studying solar wind ...

Because planets always appear in a line, the alignment isn't anything out of the norm. What's less common is seeing so many ...

Loki Patera is 202 kilometres (126 mi) in diameter, covers 20,000 sq km (7,700 sq mi), and was the largest volcanic feature found on Io until these new observations revealed the hot spot in the south ...

Six of our cosmic neighbors are expected to line up across the night sky tonight, in what has been dubbed a "planetary parade ...

NASA’s James Webb Space Telescope has revealed the atmospheric origin of exoplanet GJ 1214 b and its results challenges ...

For much of January and February, you have the chance to see six planets in our solar system after dark, although two — Uranus and Neptune — will be hard to see without a telescope or high-powered ...

NASA's Parker Solar ... to make before," Parker Solar Probe Project Manager Helene Winters said in a statement. "From the heat shield to the solar array cooling system, there was so much enabling ...