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The moon is Earth’s closest neighbor. Look up! You can see it in the night sky. Sometimes, you can see it during the day. The moon is a large rock. (Above) It is one-fourth the size of the Earth. The…
There are eight planets in our solar system. They travel in a path around the sun. Here is what you need to know about them. Mercury is the smallest planet in our solar system. It is the closest planet to…
NASA plans to send astronauts to Mars in about 15 years. It will be the first time people have set foot on that planet. Read about how NASA is getting ready. A Cold, Dry Planet Mars is a cold place.…
