NATS 1745 Lecture Notes - Lecture 19: Inverse-Square Law, Harvard College Observatory, Tegu
6 Oct 2017
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Generate their own energy interior temperatures so high --> fusion can occur. A sun is an example of a star. There are different kind of stars, (white, yellow, red dwarf stars). Stars form where interstellar clouds of dust and gas collapse and heat. When the core of star gets hot enough to ingite nuclear fusion (10 million k) Stars are formed from material in between stars. Gas, dust (soot - carbon, sand - silicon, oxygen) is called interstellar medium, when clumps of interstellar medium become dense, the clumps can collapse + form stars. Clumps collapse (grow smaller and smaller) shrink to heat and then forms a star. A star is born when fusion occurs in centre and then is generating his own energy. Stars are made most of hydrogen, and get together with helium and therefore generate energy. Positive + positive = repeal each other (both ends of magnet, they repel) (cid:894)listen to learn about the energy(cid:895)
