The Sun

Q.

What is our universe called?

Q. Paheli and Boojho observe a bright object in the night sky which was not twinkling. Paheli says, it is a star and Boojho says it is a planet. Who is correct? Do stars emit light only during night? [2 MARKS]

Q.

Tarun got to know from his elder brother that sun is the nearest star and is approximately $150$ million kilometers away from the earth. He wanted to know which is the next nearest star and what is its distance from the earth. His tutor told him that the nearest star is proxima centauri and is at a distance of $4.3$ light years from the earth. Tarun does not know what a light year is. Can you tell him?

Q. Can you identify this planet?

1. Earth
2. Jupiter
3. Saturn
4. Mercury

Q. Write the names of some cold light emitting objects.