Mars, the fourth planet from the Sun, is a subject of fascination for astronomers. Though significantly smaller than Earth, ...

Why is Mars barren and uninhabitable, while life has always thrived here on our relatively similar planet Earth?

A comparison of the cloud patterns of Mars (left) at the Martian north pole in May 2019 and those of our own planet (right). (Image credit: Mars: ESA/GCP/UPV/EHU Bilbao; Earth: EUMETSET) ...

Wave-like landforms on Mars provide clues about the planet’s icy history, its potential to support life, and the behavior of ...

A meteorite that is the largest known piece of Mars on Earth is expected to fetch up to $4 million when it goes up for ...

Mars has a diameter of about 4,212 miles (6,779 km), compared to Earth's diameter of about 7,918 miles (12,742 km), and Earth is almost seven times larger in total volume.

It's possible that Mars' moons were originally asteroids that were captured by the planet's gravitational pull. There's also ...

For comparison, the SeaStar spacecraft in Earth orbit follows a very similar orbit: it’s the diameter to altitude ratio is 17.5:1 (12,760 km or 7,928 mi diameter relative to a 705 km or 438 mi ...

Newfound rocks on Mars suggest the planet may have once sported an oxygen-rich atmosphere, making it more Earth-like and hospitable to life than previously thought.

But in a study published on August 16 in the journal Science Advances, a team from the University of Alberta calculated that around half of the 10 known Martian meteorite subgroups here on Earth ...

To be sure, Mars likely hosted some kind of water on the surface between 3.7 billion and 4.1 billion years ago, when Earth and the rest of the solar system were still young. But how exactly the ...

Why is Mars barren and uninhabitable, while life has always thrived here on our relatively similar planet Earth? A new study ...