The period of revolution increases in the order of:

$A$ satellite moves around the Earth in a circular orbit of radius $R$ making one revolution per day. $A$ second satellite moving in a circular orbit moves around the Earth once in $8$ days. The radius of the orbit of the second satellite is

For proposing the universal law of gravitation,which laws were taken for help?

$A$ planet orbits in an elliptical path of eccentricity $e$ around a massive star considered fixed at one of the foci. The point in space,where it is closest to the star is denoted by $P$ and the point,where it is farthest is denoted by $A$. Let $v_P$ and $v_A$ be the respective speeds at $P$ and $A$,then

$A$ body revolves around the sun $27$ times faster than the earth. What is the ratio of their orbital radii?

If $J$ is the angular momentum of a planet revolving around the Sun,what is the areal velocity of the planet?