100+ Universe, Earth, Solar System, Stars, Space Questions Answers - 1
What are galaxies?
The stars like the sun are seen in groups of millions or more. We call these groups as galaxies.
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.
What is the unit of measuring the distance between the earth and the stars?
We use â€˜light yearâ€™ for measuring the distance between the earth and the stars.
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.
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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