Spaceflight πβ’ Our #scientific understanding of #gravity was established by #IsaacNewton in π 1687.
β’ In π 1915, #Einstein published "The General Theory of #Relativity."
β’ #DarkMatter was first theorized in the π 1930s to explain movements of #stars π and #galaxies π that couldn't be explained by Newton's laws of gravity.
β’ Modified Newtonian dynamics (#MOND) was first proposed by Mordehai Milgrom in π 1983. https://www.youtube.com/watch?v=Qkl2ASn9yyA
β’ Recently, a new study has found direct evidence for a modified theory of gravity based on #Gaia telescope π observations.
https://interestingengineering.com/science/new-study-challenges-einstein-and-newtons-theories-of-gravity
