Infographics

A planet close to its parent star is hot like Venus, but rotates quickly and could have a substantial atmosphere.

Spoiler Alert! Here's the complicated math problems Mark Watney has to solve in order to survive in "The Martian."

Since 2004, the Cassini space probe has orbited Saturn, collecting photos and data that have revolutionized our understanding of the planet and its moons.

Astronomers group stars into classes according to spectral color and brightness.

Are we the only intelligent life in the universe? Here's how we intend to find out.

Astronomers have developed some clever methods of detecting tiny planets orbiting distant stars.

Is time travel possible? Are the past and future set or can they be changed? Sci-fi books and films have long explored these ideas.

In the film "The Martian" (2015), an astronaut played by Matt Damon has to improvise when his crew leaves him behind by accident. Here's a look at what Watney would need to stay alive on Mars.

After decades of speculation, scientists now know for sure that liquid, salty water flows on the surface of Mars. See what the discovery means in our infographic.

A series of four total lunar eclipses in a row is called a tetrad, or four Blood Moons. See how lunar eclipse tetrads work in this Space.com infographic.