A planet that orbits a star other than the Sun. The first confirmed around a Sun-like star, 51 Pegasi b, was announced in 1995, and space telescopes such as Kepler have since raised the confirmed count into the thousands, spanning types from scorching gas giants to rocky worlds.
Facts
Concept Domain Formulated YearYear of the announcement of 51 Pegasi b, the first confirmed planet around a Sun-like star; planets orbiting a pulsar had been reported in 1992. Proposed ByThe scientific search for exoplanets was formally proposed by astronomer Otto Struve in 1952, who argued planets could orbit much closer to their stars than in the Solar System and proposed Doppler spectroscopy and the transit method as detection techniques. 1 Connections
Associated With
Source Wikipedia (space and spaceflight articles)
Source Wikipedia (space and spaceflight articles)
Habitable Zone, Concepts The habitable zone concept is a central tool for assessing exoplanet habitability.
Source Wikipedia (space and spaceflight articles)
Source Wikipedia (space and spaceflight articles)
Kepler confirmed thousands of exoplanets by the transit method.
Source NASA Solar System Exploration
Kepler-452b is an exoplanet found by the Kepler mission
Proxima Centauri hosts the nearest known exoplanet to the Sun.
TESS surveys the sky for transiting exoplanets
TRAPPIST-1 is a well studied multi-planet exoplanet system
Sources
1. Wikipedia (space and spaceflight articles)
Wikimedia FoundationExoplanet, History of detection, Early speculations section
In 1952, more than 40 years before the first hot Jupiter was discovered, Otto Struve wrote that there is no compelling reason that planets could not be much closer to their parent star than is the case in the Solar System, and proposed that Doppler spectroscopy and the transit method could detect super-Jupiters in short orbits.
- Associated With: Habitable Zone
- Associated With: Drake Equation
View the Source 2. Encyclopedia Britannica: Space Exploration
NASA Solar System Exploration
National Aeronautics and Space AdministrationAssociated With: Kepler Space TelescopeView the Source Wikipedia: Exoplanet
Wikimedia FoundationIn Group: Planetary Environments and Exoplanets, Lead sentenceQuote, In Group: Planetary Environments and Exoplanets, Lead sentence
An exoplanet or extrasolar planet is a planet outside the Solar System.
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