THEORIES AND HYPOTHESIS Flashcards
A hypothesis discovered by Emmanuel Swedenborg and expanded and detailed by Immanuel Kant and Pierre-Simon Laplace
Nebular Hypothesis
He expanded the nebular hypothesis in his book “Universal Natural History and Theory of the Heavens” in 1755
Immanuel Kant
He proposed a similar and more detailed model of the nebular hypothesis; explained through his treatise “Exposition du Systeme du monde”
Pierre-Simon Laplace
4 General Steps of Nebular Hypothesis
First it started with a nebula, then formed like a flattened disc., next accretions or collisions happened, lastly it formed the solar planets
Theory proposrd by Thomas Chamberlain and Forest Ray Moulton in 1905
Planetisimal Theory
What are the 2 heavenly bodies within the planetisimal theory
Protosun and Companion/Intruding Star
Formed by the accumulation of small matter planetisimals around the sun produced when a star nearly collided with the sun, resulting in hot gases condensing
Planetisimal Theory
_______ is a gaseous forms of matter condensed then turned into a solid matter
Planetisimals
3 proponents of Dust Cloud Theory and the year they proposed the theory
Carl Friedrich von Weizacker, Gerard Peter Kuiper, and William Hunter McCrea in 1943
Planet Formation Theory
planets and other celestial entities in our solar system and beyond, develop from a cloud of dust and gas in space
Another hypothesis created by the proponents of Dust Cloud Theory. It is also known as the “revised theory”
Protoplanet Hypothesis
Protoplanet Hypothesis replaced what 2 hypothesis?
Nebular and Planetisimal Hypothesis
Fusion reaction of 2 atoms of hydrogen that combine together to form an atom of helium
Hydrogen Fusion
Nemesis Star Theory was proposed in 1980 by 2 astronauts who are?
Richard Muller and Daniel Whitmire
In Nemesis Star Theory, a hypothetical cloud of icy objects in the outermost reaches of the solar system
Oort Cloud
