Terra-3

Okay, so imagine there is a big ball called Earth, and we live on it. Now, imagine if we had three big balls that are also like Earth, but they are not really Earth. We call them Terra-1, Terra-2, and Terra-3.

Terra-3 is a special ball that we are interested in because it's like Earth. We think there is a possibility that life can exist on this ball like it does on Earth. But, the problem is that Terra-3 is very, very far away from us. So far away that we cannot go there with a spaceship like we do with the moon or nearby planets.

To study Terra-3, we use a special machine called a telescope. This machine helps us see things that are very far away, like Terra-3. When we look at Terra-3 through the telescope, we try to find out more about it. For example, we try to see if it has water, air, and land like Earth. We also try to see if it has a sun that gives it light and heat like our Sun. And we try to see if it has any living things on it.

So, in short, Terra-3 is a special ball that we study using a machine called a telescope, to try to find out if it's similar to Earth and if life can exist on it.