The Search for Extra-Solar Planets

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 The Search for Life

 The Habitable Zone

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 Detecting Planets

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 Confirmed Exoplanet Statistics

                   12/13/2018

 

Discovery Method                         Planets

Astrometry                                           1

Imaging                                               44

Radial Velocity                                705

Transit                                             3009

Transit timing variations                  15

Eclipse timing variations                   9

Microlensing                                     72

Pulsar timing variations                    6

Pulsation timing variations              2

Orbital brightness modulations      6   

 

Transiting Exoplanets                      3033

All Exoplanets                                  3869

                     Counts by Radius

Less than 1.25 Earth radius                            388

Greater than 1.25 less than 2 Earth radii    825

Greater than 2 less than 6 Earth radii        1294

Greater than 6 less than 15 Earth radii        445

Greater than 15 Earth radii                            141


       Kepler Mission Counts

Confirmed Planets discovered by Kepler                     2328

Habitable Zone Confirmed and Candidates*                361

Kepler Project Candidates                                              4717

Kepler Project Candidates  yet to be Confirmed        2425

Total Candidates and Confirmed Planets                    4770

*180 K < Equilibrium (T) < 310 K or 0.25 < Earth Insolation < 2.2

      Kepler 2 Mission Counts (08/31/2017)

Confirmed Planets Discovered by K2                             359                                178

K2 Candidates yet to be Confirmed                               473                                   515

K2 Campaign 9 Microslensing Events                             627

 


Source: NASA Exoplanet Archive, operated by California Institute of Technology for the NASA AExoplanet Exploration Program.