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.
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