Skywatchers are in for a month full of cosmic activity this August. Here’s what to know about the upcoming planetary ...

The punishing radiation appears to be causing the planet to shed its atmosphere at a rate of at least 1 trillion grams per ...

But because Venus and Mercury orbit closer to the sun than Earth, with smaller, faster orbits, it's more rare for them to make an appearance, according to NASA.

As the closest planet to the Sun, Mercury is exposed to the star's enormous gravitational field. And it's really stressful.

Two meteorites found in the Sahara show tantalizing similarities to the innermost planet, and while researchers say they are ...

It's unlikely you'll be able to walk outside and see a line of planets, but according to NASA, a seven-planet parade happening tonight could be visible in some form in parts of the U.S.

Seven-planet alignment on Feb. 28 On Feb. 28, seven planets – Saturn, Mercury, Neptune, Venus, Uranus, Jupiter and Mars – will align, creating a beautiful celestial event, according to StarWalk.

On February 24, the planet will be particularly easy to spot, appearing bright and close to Saturn, with Mercury shining about eight times brighter than Saturn.

Seven planets will be visible during the alignment: Saturn, Mercury, Neptune, Venus, Uranus, Jupiter, and Mars. Saturn will be the most difficult target to see, said StarWalk, with some locations ...