On Oct. 19, 2016, the European Space Agency's ExoMars mission arrived at Mars! ‘On This Day in Space’ Video Series on ...

Europe's Mars Express and Trace Gas Orbiter missions captured a variety of cryptic surface features poking through melting ...

A sodium cloud detected in the vicinity of an exoplanet named WASP-49 b hints at the presence of a natural satellite, also ...

Over time, the meteorites that land on Earth will be able to tell the story of events happening 200 million miles away in ...

Mars’s axis of rotation is tilted 25.2 degrees relative to the plane of the planet’s orbit around the sun, which helps give Mars seasons similar to those on Earth. Whichever hemisphere is ...

Mars is the fourth planet from the sun, and the second closest to Earth (Venus is the closest). But the distance between Earth and Mars is constantly changing as they orbit the sun. In theory ...

Mars experiences a dynamic seasonal change in its ice caps, causing fascinating geological formations. The European Space ...

Earth will get a second moon for about two months this year when a small asteroid begins to orbit our planet. The asteroid was discovered in August and is set to become a mini-moon, revolving ...

Crucially, the planet looks like it once orbited the star in the same position Earth currently travels around our sun, and did so until it was pushed to a more distant orbit, twice the Earth-sun ...

This artist's concept depicts a potential volcanic moon between the exoplanet WASP-49 b, left, and its parent star. New ...

The new research points a way forward for probing protoplanetary disks, particularly gas behavior. Given that the grains ...