100+ Universe, Earth, Solar System, Stars, Space Questions Answers - 1

Question: 1

What are galaxies?

The stars like the sun are seen in groups of millions or more. We call these groups as galaxies.

Question: 2

Why do the stars appear small?

Though the stars are very big in size, they look very small because they are several million kilometers away from the earth.

Question: 3

What is the unit of measuring the distance between the earth and the stars?

We use ‘light year’ for measuring the distance between the earth and the stars.

Question: 4

We cannot see the stars during the night. Why?

The bright light from the sun hides the stars from our sight. Hence we cannot see the stars during the day.

Question: 5

What is a light year?

We measure the distance between the earth and the stars in light years.

Light travels at a speed of 300.000 km per second.

The distance travelled by light in a year is called a light year.

One light year equals a distance of nine lakh forty six thousand and eighty crore kms.