1. Gaseous Hypothesis -Kant
2. Nebular Hypothesis- Laplace
3. Planetesimal Hypothesis- T.C. Chamberlain & F. R. Moulten
4. Tidal Hypothesis -James Jeans & Harold Jeffreys
5. Meteoric Hypothesis- Lockyer
6. Binary Star Hypothesis -H.N. Russel
7. Fission Hypothesis- Ross Gun
8. Cepheid Hypothesis- A.C. Banerji
9. Supernova Hypothesis- F. Hoyle
10. Interstellar Dust Hypothesis- Otto Schmidt
11. Nebular Cloud Hypothesis -Von Weizsacker
12. Protoplanet Hypothesis- Gerald Kuiper
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