Space Exploration

Two controversial new studies suggest the discovery of large objects at the outer reaches of the solar system

Report from a simulated Martian research station

New findings reveal a crater’s vaporous hazes, and hint at the dwarf planet’s possible origin in the outer solar system

A new breed of giants raises questions about how the biggest galaxies arise

New study explores how life on one exoplanet could spread to its neighbor

Five years after a failed insertion into planet's orbit, Akatsuki tries again

A newly passed bill sets the stage for the future of the private spaceflight industry, and could have big implications for asteroid mining

Decision throws construction of the Thirty Meter Telescope into question

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