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Planet Hunters is a citizen science project to find exoplanets using human eyes. It does this by having users analyze data from the NASA Kepler space telescope and the NASA Transiting Exoplanet Survey Satellite. [1] [2] It was launched by a team led by Debra Fischer at Yale University, [3] as part of the Zooniverse project. [4]
While the radial velocity method provides information about a planet's mass, the photometric method can determine the planet's radius. If a planet crosses in front of its parent star's disk, then the observed visual brightness of the star drops by a small amount, depending on the relative sizes of the star and the planet. [6]
An artist's rendition of Kepler-62f, a potentially habitable exoplanet discovered using data transmitted by the Kepler space telescope. The list of exoplanets detected by the Kepler space telescope contains bodies with a wide variety of properties, with significant ranges in orbital distances, masses, radii, composition, habitability, and host star type.
Gemini Planet Imager (GPI) Active 1 [9] Geneva Extrasolar Planet Search: Active 1+ High Accuracy Radial Velocity Planet Searcher (HARPS) Active 130+ [10] HARPS-N: Active 18+ [11] HATNet and HATSouth Projects (HAT) Active 109 [12] [13] Hunt for Exomoons with Kepler (HEK) Active 0 (A few candidates, including Kepler-1625 b I) HiCIAO: Active 0
Scientists say they have found new evidence that there is a hidden planet in our solar system. For years, some astronomers have been suggesting that unusual behaviour on the edge of our solar ...
Tadmor: The radial velocity variations of the star Errai were announced in 1989, consistent with a planet in a 2.5-year orbit. [5] However, misclassification of the star as a giant combined with an underestimation of the orbit of the Gamma Cephei binary, which implied the planet's orbit would be unstable, led some astronomers to suspect the variations were merely due to stellar rotation.
Scientists and researchers have long believed that a planet must have an atmosphere in order to sustain the conditions, but caution that the current findings are only a step in that search.
Estimates place the probability of finding a habitable planet around Alpha Centauri A or B at roughly 75%. [11] Alpha Centauri is the target of several exoplanet-finding missions, including Breakthrough Starshot and Mission Centaur, the latter of which is chronicled in the 2016 documentary film The Search for Earth Proxima. [12]