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Answers
Answer:
1. Immanuel Kant and Pierre Laplace
2. Georges Lemaître
3. Supernova Explosion
4. Moon-size planetary embryos (protoplanets)
5. An idea that proposes a tentative explanation about a phenomenon or a narrow set of phenomena observed in the natural world.
Explanation:
1. The theory was developed by Immanuel Kant and published in his Universal Natural History and Theory of the Heavens (1755) and then modified in 1796 by Pierre Laplace.
2. Georges Lemaître, (1894-1966), Belgian cosmologist, Catholic priest, and father of the Big Bang theory.
3. A massive star will undergo a supernova explosion. If the remnant of the explosion is 1.4 to about 3 times as massive as our Sun, it will become a neutron star. The core of a massive star that has more than roughly 3 times the mass of our Sun after the explosion will do something quite different.
4. Collisions and gravitational interactions between planetesimals combine to produce Moon-size planetary embryos (protoplanets) over roughly 0.1–1 million years. Finally, the planetary embryos collide to form planets over 10–100 million years.