How do we find asteroids?

Distances to objects in space are very, very large. The nearest star (excluding the Sun), Alpha Centauri, is 41.23 trillion km, or 41,320,000,000,000 km!!

Have you ever wondered how many stars you can see in the night sky? Did you know that the number you can see depends on where you are?

Impact craters are made when a space rock (called a meteorite or asteroid) hits a rocky planet or moon. The impact makes a round hole in the surface, called a crater.

The Sun is a constant presence in our life on Earth. It gives us the heat and light we need to survive. But it is not a stable place. The Sun is a ball of hot plasma which is constantly changing.

You have probably seen the Moon in the sky but have you ever studied it in detail?

Many years ago, a mathematician named Johannes Kepler created a set of rules explaining planets' movement in our Solar System.