hey, what does gravity have to do with planetary motion? please explain fully or give me a web link. this is for a project, and internet not helping much. thnks very much.
2006-08-09 22:35:13 · 3 answers · asked by voodoochild 4 in Education & Reference ➔ Homework Help
gravity attracts the planets towards the center. it is the centripetal force. the centrifugal force acts outwanrds on these planets . the magnitude of these both is almost equal and hence the planets remain in their specified orbits.
u can search the wikipedia or the britannica
2006-08-09 23:24:01 · answer #1 · answered by Anonymous · 0⤊ 0⤋
Gravity opposes repelling forces such as centrifugal & centrepetal forces, to allow bodies to orbit each another.
However, there MAY also be an extremely weak "dark energy" that repels bodies. This is a force that was only found, when observing the red-shift in pulsars to try to calculate the slow down in the expansion in the universe - they realised the expansion is speeding up - ergo, some weak "dark energy" is repelling bodies.
2006-08-09 22:55:48 · answer #2 · answered by dryheatdave 6 · 0⤊ 0⤋
it causes it
2006-08-09 22:38:52 · answer #3 · answered by Anonymous · 0⤊ 0⤋