How is a supernova different from a hypernova? Learn about the different types of exploding stars that astronomers have identified.
Ridley Scott's new space film showcases a lot of space hardware derived from actual NASA plans for interplanetary travel.
Planned in the 1960s but never realized, the Gemini-based manned spy satellite was finally declassified in 2015.
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.
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.
Daredevil sungrazing comets risk annihilation every time they skim the surface of our star. Here's how the Solar and Heliospheric Observatory tracks these comet interlopers.
Amazon.com founder Jeff Bezos leads Blue Origin, a commercial aerospace firm that hopes to send people on suborbital and orbital space trips.
How Solar Eclipses Work: When the moon covers up the sun, skywatchers delight in the opportunity to see a rare spectacle.
A planet only 20 million years old and still hot from its creation has been photographed in a solar system 96 light-years from Earth.
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