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constellations. These groups are named after animals and ancient heroes.
The constellations change their position in the sky. They move from the East
to the West. Ursa Major , Orion , Big Dipper and Cancer are some examples of
constellations.
Knowledge Plus
Scientists have given name 'sol' to the Sun. That's why, our system of
planets is called solar system.
The Sun
The Sun is a giant ball of hot glowing gases. It is the nearest star to the Earth,
that is why we get enough heat and light from it. The other stars are far away
from the Earth. So, they look very small.
THE SOLAR SYSTEM
The Sun, the eight planets, their moons and the dwarf planets form the solar
system. The word ‘planet ’ means ‘wanderer ’. Planets do not emit light of their
own. They only reflect the sunlight. These planets are made up of rocks,
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