Who presented the Nebular hypothesis regarding the origin of the earth (in its revised form)?

Which one of the following astronomers proved that the Earth and other planets revolve around the Sun ?

Which of the following statements is true regarding earth movement? 1. Earth rotates on its axis from west to east resulting into seasonal changes. 2. Earth revolution around sun results into occurre…

Which one of the following conditions is most relevant for the presence of life on Mars?

The earth is nearest to the sun on –

In Sun-Earth system, the Sun, the Earth and the Lagrange point L4 form: