Extrasolar planet Timeline of Events

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Extrasolar planet

An extrasolar planet, or exoplanet, is a planet outside the Solar System. A total of such planets have been identified as of . It is now known that a substantial fraction of stars have planets, including perhaps half of all Sun-like stars...

Timeline of Events

1994

4.21.1994

The first discoveries of extrasolar planets are announced by astronomer Alexander Wolszczan.

1995

10.6.1995

51 Pegasi is discovered to be the first major star apart from the Sun to have a planet (and extrasolar planet) orbiting around it.

2001

11.27.2001

A hydrogen atmosphere is discovered on the extrasolar planet Osiris by the Hubble Space Telescope, the first atmosphere detected on an extrasolar planet.

2006

1.25.2006

Three independent observing campaigns announce the discovery of OGLE-2005-BLG-390Lb through gravitational microlensing, the first cool rocky/icy extrasolar planet around a main-sequence star.