All seven of the other planets in our solar system are about to become visible at once in a great planetary alignment – ...

Mars's moon Phobos is so strange that no one knows how it formed. But a forthcoming mission could solve this mystery - and a ...

With a radius of 2,106 miles, Mars is the seventh largest planet in our solar system and about half the diameter of Earth. Its surface gravity is 37.5 percent of Earth’s. Mars rotates on its ...

Keep your eyes on the sky. Six planets in our solar system are coming into alignment and will be visible from Earth. AccuWeather says Saturn, Venus, Neptune, Uranus, Jupiter and Mars will be visible ...

Mars's atmosphere and climate are impacted by interactions with solar wind, a stream of plasma comprised of protons and electrons that flows from the sun's outermost atmosphere (corona), traveling at ...

This time, the top contenders are the U.S. and China. There are many obstacles to overcome before humans can set foot on Mars, including problems surrounding launch mass and closed-loop systems ...

From inner planet Mercury to eight planet from the Sun, Neptune, here are the highlights and dates for your diary so you can get the best from seeing the Solar System ... to watch Mars in the ...