In the 30 years since the discovery of 51 Pegasi b, more than 6,000 planets outside our Solar System have been catalogued. Two modern-day explorers explain how.

The search for an unknown planet in our solar system has inspired astronomers for more than a century. Now, a recent study ...

Space scientists look back on 30 years of exoplanet discoveries — from rows of massive ‘super-Earths‘ to worlds with ...

New research suggests that planets outside our solar system contain far less surface water than scientists once believed.

I recall as a child lying on the grass at night, gazing up at the stars, and wondering if any of those distant suns had planets orbiting nearby. I was not the first to do so, of course. The question ...

While telescopes point up at the sky and scan the recesses of space, probes like Voyager 1 are traveling incredible distances ...

New observations suggest that the dwarf planet Makemake is surrounded by faintly glowing methane gas. Scientists are unsure ...