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.

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Answer 1

1.celestial bodies are the natural occurring things which are there in space.

2.universe is the term used for outer space

3.a celestial body made up of gases

4. galaxy

q2. earth is called a celestial body Caz it is present in space

q3.big bang is a collision of 2 stars which is said to be making everything

Answer 2

Answer:

1) 1. A celestial body is any natural body outside of the Earth's atmosphere.

2. The universe is all of space and time and their contents, including planets, stars, galaxies, and all other forms of matter and energy.

3. A nebula is an interstellar cloud of dust, hydrogen, helium and other ionized gases.

4. A galaxy is a gravitationally bound system of stars, stellar remnants, interstellar gas, dust, and dark matter.

2) Celestial bodies or heavenly bodies are objects in space such as the sun, moon, planets, and stars. That is why, Earth is also a celestial body.

3) The explosion of an extremely small, hot, and dense body of matter that, according to some cosmological theories, gave rise to the universe between 12 and 20 billion years ago.

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