A new study offers the best measurements yet of the densities of the TRAPPIST-1 planets.
Lori Dajose
From October 16–22, Caltech and nine other institutions are participating in Pasadena Astronomy Week to celebrate the city's rich history in astronomy.
Using data from NASA's Kepler spacecraft, scientists have confirmed 104 planets outside of our solar system.
How do some gas giant planets end up so feverishly close to their stars? NASA's Spitzer Space Telescope finds new clues.
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