Stars and the S...

Which of the following theories is the most satisfactory about the origin of the universe?

Which one of the following is correct?
Great bear is a 

Which of the following astronomer first proposed that the sun is static and the earth rounds the sun

In our solar system, the inner-planetary region has chunks of matter ( much smaller in size compared to planets) called asteroids .They

Consider the following statements:
1. Only two planets Venus and Uranus revolve around the Sun from east to west i.e. clockwise.
2. While other planets revolve around the from west to east i.e. anti-clockwise.
Which of the above statements is/are correct?

The tail of a comet points 

The percentage of Sun's total energy which reaches the earth's surface is

Smaller pieces of heavy stones and metals which on entering earth's atmosphere burns out are

Which one of the following planet has the longest day

Which one of the following is known as Saptarishi