Commentary: SpaceX has advanced a vision of a city built on Mars as soon as the 2060s, but a galaxy of technical, ethical, legal and other questions need to be answered first.
The SpaceX founder wants to build a Martian metropolis in our lifetime. Is the plan historic or just hubris? We discuss.
Because what would a frontier be like without 'em?
The solar system's smallest planet is still tectonically active.
NASA's Hubble telescope may have spotted water plumes. That could make it much easier to sample Europa's supposed subsurface ocean, where we just might find the building blocks for life.
Get out your magnifying glass. A Cassini photo of Saturn's rings turns into a visual hunt for one of the planet's smallest moons.
This Humble Book Bundle lets you grab sci-fi books by space psychologists, astrophysicists, geneticists and other scientists, while raising money for charity.
Get up close and personal with Saturn in a Cassini movie showing four days in the life of the ringed planet.
Pluto's unique moon Charon gets its blushing red pole thanks to an artistic touch from the dwarf planet.
Back in 1966, a NASA spacecraft carried people far above the Earth's surface, setting a new altitude record and giving us a gorgeous view of the planet below.
They're 10 times farther away than the closest possible exoplanet, but a trio of Earth-size planets might actually be the best candidates so far in the search for life beyond our solar system.
The US Air Force hit NASA up for some extra parking space to keep its expensive fighter jets protected from bad weather.
A pill for love?
CNET's tech-oriented short fiction explores a world where love comes in a capsule.