As the sun grew hotter, so did Mars, prompting much of its atmospheric carbon dioxide to rain out and ultimately get locked up in rocks.

Even though gravity pulls everything into a round shape, not all planets are perfectly spherical. As per a report presented by spaceplace(dot)nasa(dot)gov, some planets, especially the larger ones ...

One summer night in 1877, American astronomer Asaph Hall was looking through his telescope in Washington, D.C. Mars was at ...

Since 2016, the spacecraft has been analyzing the levels of methane and other gases in Mars' atmosphere. Such deposits usually would be indistinguishable from the rest of the planet's surface.

On a new planet, this happens from all directions at once, so the planet is crushed into a round shape. ... If you eyeball Earth or even Mars from space, they’ll look pretty round.

Earth is round, but are there any planets in the universe that aren't? When you purchase through links on our site, we may earn an affiliate commission. Here’s how it works .

Dwarf planets are smaller planets that do not meet all three categories of a planet. According to NASA, they are round in shape and orbit the sun, but don’t clear their orbital path.

The new images by the Curiosity rover on Mars show "dramatic evidence" of ancient groundwater in crisscrossing low ridges, ...

Today, Mars has two tiny moons. But early in its history, the Red Planet may have had a much larger moon, which might be responsible for Mars' weird shape and extreme terrain, Michael Efroimsky ...

Mars, the fourth planet from the sun is famed for its rusty red appearance. ... On top of much of these layered deposits in both hemispheres are caps of water ice that remain frozen year-round.

Every planet in our solar system is essentially round. But out in the universe, are there any planets that aren't spherical? Technically, planets are round, by definition; they need to have enough ...