NASA's Spitzer Space Telescope has revealed the first known system of seven Earth-size planets around a single star. Three of these planets are firmly located in the habitable zone, the area around the parent star where a rocky planet is most likely to have liquid water.
A planet and a star are having a tumultuous romance that can be detected from 370 light-years away.
iillustration of a blue planet near a yellow sun
The supernova SN 2014C dramatically changed in appearance over the course of a year, surprising astronomers.
Whitney Clavin
A Caltech team has designed and built a new imaging spectrograph to map streams of gas that feed forming galaxies.
A mysterious neutron star has been caught behaving like two distinct objects—a radio pulsar and a magnetar.
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.
Lori Dajose
Caltech's partnership with NASA's Jet Propulsion Laboratory has made possible countless discoveries about our universe. Current Caltech faculty are participants on 12 missions.
Lori Dajose
In anticipation of Juno's arrival at Jupiter on July 4, three Caltech faculty share thoughts on the planet, the mission, and the solar system.
How do some gas giant planets end up so feverishly close to their stars? NASA's Spitzer Space Telescope finds new clues.
A strange new kind of galactic beast has been spotted in the cosmic wilderness. Dubbed "super spirals," these unprecedented galaxies dwarf our own Milky Way.
More than 1,000 people gathered to hear exceptional researchers, including 5 Nobel Laureates, from across disciplines to consider our future at a conference honoring Ahmed Zewail.
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