A highly stylized rendition of our solar system NASA/JPL If someone asked which planet was closest to Earth, you’d be pretty certain — it’s Venus. We measure distances in the solar system in terms of ...

Astronomers have, for the first time, pinned down both the mass and distance of a planet that drifts through the galaxy without a parent star, turning a once purely theoretical class of worlds into a ...

The universe, as Douglas Adams so memorably explained, is big. Really big. But so are the things inside it -- even objects like the Solar System, which on a galactic scale are absolutely minuscule. A ...

Astrobiologists disagree about whether advanced life is common or rare in our universe. But new research suggests that one thing is pretty certain – if an Earthlike world with significant water is ...

Astronomers have spent decades hunting for life where it seemed to make sense: on Earth-like planets orbiting Sun-like stars at just the right distance. But a new study from a team of European ...

Over the past several years, astronomers have discovered a number of planets within so-called circumbinary systems, including Kepler-34(AB)b — a planet reminiscent of Star Wars’ Tatooine. Now, using ...