Comets Comets are objects composed of ices and dust particles, and they orbit the Sun, making them members of our Solar System.
The Phases of the Moon The most obvious change we see in our view of any celestial object is the sequence of phases of the Moon.
Make your own sundial In this activity you will learn to make a simple sundial, called a horizontal sundial, that can be used to show the time.
Eclipses From Earth, we see two types of eclipses related to the Sun and the Moon: solar eclipses and lunar eclipses.
Meteors and meteorites The vast majority of meteors seen in the night sky are caused by tiny pieces of debris from comets, while the larger and more solid objects, some of which reach Earth intact, are mostly related to asteroids