Did you know that Earth is the only planet known to have life? Or that scientists study Earth with spacecraft, just like other planets in the solar system? Look inside to learn more about Earth and its place in the solar system.
Everyone knows what those glowing points of light in the night sky arebut do you know what they are made of? The Stars: Glowing Spheres in the Sky answers this question as well as many others, such as How are stars formed? How far away from Earth is the nearest star? What is the biggest star? and What is a black hole?
Did you know that people have been living and working on space stations for more than 30 years? Or that scientists hope to build a space station on a faraway planet? Explore space stations and how they are helping us prepare to go farther out into our solar system.