Computer simulations suggest that Mars' puzzling moons, Phobos and Deimos, may have been formed from debris created when a ...

This turbulence is influenced by Mars’ distance from the Sun, which varies by up to 40% over the course of a Martian year.

Happy New Year's on Mars. Martian years are almost twice as long as Earth years. Nov. 12 is the day to celebrate the start of ...

For one, Mars is on average about 50 percent farther from the sun than Earth is, with an average orbital distance of 142 million miles. This means that it takes Mars longer to complete a single ...

Together, the instruments have shown that the rate of hydrogen loss is seasonal, with large increases in the escape rate at perihelion, which is Mars' closest point in its orbit around the sun.

Mars is going to be much brighter than Uranus ... That’s about 19 times the Earth-sun distance. It’s so far away that the light you see reflected from Uranus takes around three hours to ...