Using the same planet-hunting techniques as Earth astronomers, would inhabitants of a planet hundreds of light-years away be able to detect Earth? Or would the gas giants overpower their observations?

A new planet-hunting instrument at W. M. Keck Observatory has achieved "first light," capturing its first data from the sky and marking an exciting chapter in the search for Earth-sized planets around ...

A long-proposed tool for hunting planets has netted its first catch — a Jupiter-like planet orbiting one of the smallest stars known. The technique, called astrometry, was first attempted 50 years ago ...

Exoplanet studies have come a long way in a short time. To date, 5,523 exoplanets have been confirmed in 4,117 systems, with another 9,867 candidates awaiting confirmation. With all these planets ...

Artist's illustration of the European Space Agency's PLATO spacecraft in full operation. After nearly thirty years of extrasolar planet hunting, finding an earth-like planet orbiting another sunlike ...

When astronomers discovered the first worlds orbiting other stars thirty years ago, they also began taking what might be called the galactic planetary census, tallying up the numbers and types of ...

Chris Lintott of Zooniverse shows ‘Stargazing Live’ hosts Brian Cox and Julia Zemiro the possible planets found so far by the Exoplanet Explorers project, using gumballs to represent different types ...

The most prolific planet-hunting machine in history has signed off. NASA's Kepler space telescope, which has discovered 70 percent of the 3,800 confirmed alien worlds to date, has run out of fuel, ...