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The first report of an exoplanet within this range was in 1998 for a planet orbiting around Gliese 876 (15.3 light-years (ly) away), and the latest as of 2024 is one around Struve 2398 A (11.5 ly). The closest exoplanets are those found orbiting the star closest to the Solar System, which is Proxima Centauri 4.25 light-years away
The exoplanets were found using a statistical technique called "verification by multiplicity". 95% of the discovered exoplanets were smaller than Neptune and four, including Kepler-296f, were less than 2 1/2 the size of Earth and were in habitable zones where surface temperatures are suitable for liquid water. [73] [74] [75]
0–9. List of exoplanets discovered before 2000; List of exoplanets discovered between 2000–2009; List of exoplanets discovered in 2010; List of exoplanets discovered in 2011
It was found by NASA's Transiting Exoplanet Survey Satellite, or TESS, space telescope. "This is the youngest-known transiting planet. It is on par with the youngest planets known," Barber said.
Proxima Centauri b is the closest exoplanet to Earth, [19] at a distance of about 4.2 ly (1.3 parsecs). [4] It orbits Proxima Centauri every 11.186 Earth days at a distance of about 0.049 AU, [1] over 20 times closer to Proxima Centauri than Earth is to the Sun. [20] As of 2021, it is unclear whether it has an eccentricity [e] [23] but Proxima Centauri b is unlikely to have any obliquity. [24]
This was discovered independently by the OGLE and MOA teams. [5] First exoplanet discovered by directly imaging the extrasolar planet 2M1207 b: 2M1207: 2004/ 2005 May be a brown dwarf instead of a planet, depending on formation mechanism and definitions chosen. [6] First planet discovered through variable star timing V391 Pegasi b: V391 Pegasi ...
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“HD 189733 b is not only a gas giant planet, but also a ‘giant’ in the field of exoplanets because it is one of the first transiting exoplanets ever discovered,” said lead study author ...