One summer night in 1877, American astronomer Asaph Hall was looking through his telescope in Washington, D.C. Mars was at its closest point to Earth in its orbit, and Hall had one question on his ...

Former NASA astronaut and moon-walker Buzz Aldrin told Business Insider about his vision for a shuttling system to Mars. He said there's no reason to build a permanent human colony on the moon, but ...

A NASA rover captured images of a Martian eclipse that resembled a googly-eye peering down at the red planet. The space agency released photos and video Wednesday that show the Martian moon Phobos ...

When Earth is opposite Mars from the sun, it will appear full because you’re looking directly on the daylit side. But ...

During a flyby of Mars on Wednesday (March 12), ESA's Hera spacecraft inaugurated use of its science instruments to image the smaller of the planet's two moons, Deimos. The European Space Agency (ESA) ...

Because the Earth is doing the work of increasing the Moon's momentum, the Earth's rotation slows down in turn, as its momentum goes to the Moon. To put it another way, as the Moon's orbital momentum ...

As scientists get closer to putting humans on Mars, the need to understand why clocks tick faster on the red planet is more ...

The agency has cheaper and farther-reaching missions in its sights. NASA is asking six companies to help the agency move spacecraft between difficult-to-reach orbits. The agency recently awarded a ...