Answers

2016-01-18T07:04:27+05:30
It doesent need energy

0
But I studied that an object is said to be in motion when it comes under the effect of force and displacement.. Here displacement is there but force is missing..
2016-01-19T06:29:01+05:30
It rotates due to the gravitational pull of sun
0
then how it rotates it should be pulled towards the sun