Space Exploration

Astronauts already skip ahead in time, but the laws of physics seem to forbid going backward—or do they?

As the private space company Blue Origin achieves a 100 kilometer suborbital flight, and a spectacular re-landing of its rocket, it's worth pausing to consider the basic energy requirements of spaceflight from the surface of the Earth.

New legislation and interest from a number of private ventures could lead to extraction of valuable minerals from asteroids—and sooner than you might think

A dozen quasars in the early universe appear to have shut down in just a few years, baffling astronomers

Findings from NASA’s Cassini spacecraft suggests winter in Titan's southern hemisphere will be even colder than predicted

Scientists photograph a gas-giant exoplanet forming around a young star that lies about 450 light-years from Earth

What we know about alien worlds—and what’s coming next

The recently discovered small galaxy Leo P contains only about a hundred-thousandth as many stars as the Milky Way, but it's bucking the small galaxy trend by continuing to make new ones

A new explanation for the strange grooves on the surface of the martian moon Phobos suggests that the entire satellite already shows signs of how it will eventually be destroyed.

More than a hundred times as distant from the sun as Earth is, the object could be a pristine remnant from the primordial solar system

New Horizons reveals the orbits of Pluto's four smallest moons to be even more chaotic than expected