when was first planet outside solar system discovered
Exoplanet
An exoplanet ( UK : / ˈɛk. soʊˌplæn. ɪt / , US : / ˌɛk. soʊˈplæn. ɪt / ) or extrasolar planet is a planet outside our solar system . The first evidence of an exoplanet was noted as early as 1917 , but was not recognized as such . However , the first scientific detection of an exoplanet was in 1988 , although it was not accepted as an exoplanet until later . The first confirmed detection occurred in 1992 . As of 1 August 2018 , there are 3,815 confirmed planets in 2,853 systems , with 633 systems having more than one planet . 
An exoplanet ( UK : / ˈɛk. soʊˌplæn. ɪt / , US : / ˌɛk. soʊˈplæn. ɪt / ) or extrasolar planet is a planet outside our solar system . The first evidence of an exoplanet was noted as early as 1917 , but was not recognized as such . However , the first scientific detection of an exoplanet was in 1988 , although it was not accepted as an exoplanet until later . The first confirmed detection occurred in 1992 . As of 1 August 2018 , there are 3,815 confirmed planets in 2,853 systems , with 633 systems having more than one planet .
The first evidence of an exoplanet was noted as early as 1917, but was not recognized as such. The first scientific detection of an exoplanet was in 1988, although it was not accepted as an exoplanet until later. The first confirmed detection occurred in 1992.
The first evidence of an exoplanet was noted as early as 1917 , but was not recognized as such . The first confirmed detection occurred in 1992 .
The first evidence of an exoplanet was noted in 1917, however , the first scientific detection of an exoplanet was in 1988 , but it was not accepted as an exoplanet until later. The first confirmed detection occurred in 1992 .
The first evidence of an exoplanet was noted as early as 1917 , but was not recognized as such . However , the first scientific detection of an exoplanet was in 1988 , although it was not accepted as an exoplanet until later . The first confirmed detection occurred in 1992 .