Stargazers will be treated to a rare seven-planet alignment in February. This is what scientists hope to learn.

On the evening of February 28, stargazers will witness a rare celestial event: an alignment of seven planets visible ...

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

The six planets will be visible in the days immediately leading up to Jan. 21, and for about four weeks afterward. Mars, ...

Venus and Saturn will be in conjunction this weekend, appearing side by side in the night sky during January's post-sunset ...

Venus, Saturn, Jupiter and Mars will appear to line up and be bright enough to see with the naked eye in the first few hours ...

Both Venus and Saturn will be in the Aquarius constellation, the water bearer, during their close approach. To help spot it, ...

Alignments of five or more planets are rare—there will be two more featuring five or more planets this year, but after that ...

Jupiter's Great Red Spot storm, which usually appears dark-red, can be seen shining a lurid blue color in an ultraviolet ...

Plus: Saturn’s moon Iapetus is visible, our Moon passes the bright star Spica, and Mars skims south of Pollux in Gemini in ...

The ultimate source of light and energy, the Sun is by far the brightest object in our solar system. Its luminosity illuminates all other celestial bodies. Earth's natural satellite, the Moon reflects ...

While Viking prides itself on a rather forthright though persuasive “no casinos, no children” policy, it could easily add “no ...