A planet which is bom sister of earth is

The difference in the lengths of a mean solar day and a sidereal day is about

Asteroids are

Sun radiates continuously and maintains its brightness because

Venus appears brighter than other stars because

There is no atmosphere on moon because

Which of the following planets have rings around it

Milky way is

Hubble's law states that the velocity with which the 'milky way' is moving away from the earth is proportional to

The hottest planet of solar system is