G-6-L-1

• The sun, the moon and all those objects shining in the night sky are called celestial bodies.
• These celestial bodies are called stars. The sun is a star.
• The Big Dipper (US) or the Plough (UK, Ireland) is a large asterism consisting of seven bright stars of the constellationUrsa Major.
• The North star indicates the north direction. It is also called the Pole Star.
• Light travels at the speed of about 300,000 km per second.

Moon

• Neil Armstrong was the first man to step on the surface of the moon on 29 July 1969.
• Its diameter of moon is only one-quarter that of the earth.
• It is about 3,84,400 km away from EARTH.
• The moon moves around the earth in about 27 days.
• One side of the moon always faces Earth. Even so, over time, it's possible to see as much as 59% of the moon's surface, due to lunar libration.
• Mons Huygens is the Moon's tallest mountain.

1. The largest asteroid is the Ceres.
2. The small pieces of rocks which move around the sun are called meteoroids.
3. In our solar system, the planets orbit around the Sun in a elliptical path.

• The Pole Star indicates the direction to the North.
• Asteroids are found between the orbits of Mars and Jupiter.