Question

Q.1 Define the following terms :
1. Celestial bodies
2. Universe
3. Nebula
4. Galaxy

Q.2 Why Earth is called celestial body?

Q.3 Explain the term Big Bang.

in 3 to 4 line
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Answer 1

Answer:

question 1 : 1.

Any natural body present in the

space and outside the earth's body

is known as celestial body.

2. Universe is all of space and planets which are present outside the earth

3. Nebula is the interstellar cloud of dust, hydrogen and helium and other gases.

4. galaxy is a gravitationally bound system of stars, dust and other gases