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

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

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

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

As soon as it gets dark, two bright lights become visible—the brightest in the southwest and an almost-as-bright light in the ...

Throughout January, stargazers in India can witness a spectacular planetary parade featuring Mars, Jupiter, Uranus, Venus, ...

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

Six planets will all be visible at once in the night sky this month, lined up across the sky—but one is set to disappear from view.

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

A planet parade like the one beginning tonight is quite uncommon, occurring once every 10-20 years. Here are the planets you ...

The larger moons of Pluto and Earth likely formed through a collisional process with Charon and our moon, respectively, ...

Alinda, measuring 2.6 miles wide, will be visible this weekend. Stargazers can spot it using basic equipment or watch a ...