Question

In your own words, explain a crucial piece of evidence that Johannes Kepler could have used to support one of his laws of planetary motion.

Answer 1

@Destinymasha i dont get this question..

Answer 2

I know how to use them, but I am not so sure as to how they were derived or proved
but I found this and it explains it all:

https://au.answers.yahoo.com/question/index?qid=20111219123853AA4QNrP

Answer 3

evidence he could of used.. not that he used.. ( i saw that website too xD :) )

Answer 4

hmm...

Answer 5

gosh... idk .-.

Answer 6

What he could've used is the position of mars around the sun; that's the piece of evidence.

Answer 7

for which of his laws ?

Answer 8

the 1st one

Answer 9

the one that says that the movement of planet around the sun is an ellipse :)

Answer 10

okay :D