Gaseous Hypothesis  Immanuel Kant     1755

Nebular Hypothesis       Laplace          1796

Planetesimal Hypothesis    Chamberlin & Moulton 1904

Tidal Theories  Jeans & Jeffrey’s 1904 & 1929

Binary Star Hypothesis Russel & Littleton 1937

Super Nova Hypothesis            F. Hoyle

Meteorite Hypothesis           Otto Schmidt

Supernova Hypothesis.             Hoyle     1946

Inter-stellar Cloud Hypothesis     Hannes Alfven

Inter-stellar Dust Hypothesis       Otto Schimidt

Rotational & Tidal Hypothesis     Rossgum

Jupiter-Sun-Binary System Hypothesis    E.M. Drobyshevski