Fig. 19.

Observed distribution of orbital velocities of 1183 exoplanets having masses > 0.05 Jupiter mass, extracted from the NASA Exoplanet Archive (2019) (June 2019 data containing 4104 confirmed planets). This PDF exhibits a large probability peak at a velocity of ≈150 km s−1, which is the same value as the main orbital velocity peak of galaxies in pairs.
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