Class 8 Science Chapter 17 Stars and The Solar System

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Hello Kids ! In today’s article, we are going to see about the chapter Stars and The Solar System.

Like children – as the night begins to fall. Different types of shapes start appearing in the sky.

Many stars become visible. Some less bright, some more bright.

celestial body:
The stars, planets, moon and other bodies which are visible at night are collectively called celestial bodies.

moon :
It appears in the sky every night. When the full moon is visible, it is called Poornima.

Stars and the Solar System

After the full moon, the size of the moon gets smaller day by day. After fifteen days the moon is not visible. There is new moon on that day. After this the size increases everyday till the full moon.

There is a gap of 29 days and few hours between one full moon and another full moon.

We can see only that part of the moon. The part from which the reflected light of the sun reaches our eyes.

The only natural satellite of the Earth is the Moon.

The one who goes round the earth.

Earth itself is a planet, whose function is to revolve around the Sun.

Important question:
What is the name of the natural satellite of the earth?

In how much time does the Moon complete one orbit of the Earth?
In 29 days and few hours.

Who is called Bal Chandra?
On the next day of Amavasya, a small part of the Moon is visible in the sky. This is called Bal Chandra.

Who was the first to step on the moon?
Neil Armstrong.

At what distance is the Sun from the Earth?
15 crore kms.

Which is the second nearest star to the Earth after the Sun?
Alpha Centauri is. Whose distance is 40,000,000,000,000 kilometers.

What is the speed of light?
3,00,000 kilometers per second. Thus the distance of the Earth from the Sun is about 8 light minutes.

What is the constellation called?
A group of recognizable shapes is called a constellation.

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