The Solar System: Stars are large celestial bodies that have their own light. Planets, satellites, and comets are celestial bodies that have no light of their own. We use the telescope to see these celestial bodies. The nearest star to the Earth is the Sun. The Sun gives us the necessary heat and light for life. Around the Sun there are various celestial bodies like planets, satellites and comets, which form the Solar System. The planets revolve around the Sun. In the Solar System, you can find Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus and Neptune. Satellites revolve around a planet. The moon is the Earth's satellite. Comets revolve around the Sun and have a tail that reflects the Sun's light.