The Earth In The Solar System
The Earth In The Solar System Facts To Remember
- Stars and moon are visible only at night as sunlight makes them invisible during the day.
- Stars in the night sky are similar to the sun but we do not feel their light or heat as they are very far from us.
- Ursa Major or Big Bear and Saptarishi are constellations.
- Jupiter, Saturn and Uranus have rings around them. These rings are belts of small debris.
- Mercury, Venus, Earth and Mars move closer to the sun and are called inner planets. Inner planets are made up of rocks.
- Jupiter, Saturn, Uranus and Neptune move away from the sun and are called outer planets.
- Outer planets are made up of gases and liquids.
- Since 2006 Pluto has been recognised as a “dwarf planet”.
- The speed of light is 300,000 km/sec. The light of the sun takes about 8 minutes to reach Earth.
- The word ‘planet’ is derived from the Greek word ‘Planetai’ which means ‘Wanderers’.
The Sun and the Planets:
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