Introduction
- On a dark night in a clear atmosphere where there is no bright light, dust or smoke we can see the sky full of twinkling stars.
- we can notice many other objects that do not twinkle they are known as planets.
- The brightest object in the night sky is the moon.
- In the sky, there are stars, planets, the moon and many other objects they are known as celestial objects.
- All the celestial objects are different from each other.