Stargazers will be treated to a rare seven-planet alignment in February. This is what scientists hope to learn.

Try stargazing. Need a new idea to keep kids entertained? Try stargazing. Free learning activities and videos about the solar system Free learning activities and videos about the solar system Free ...

Even so, there are parts of the distant Solar System that we know about, such as the Kuiper Belt. It's all good and well knowing facts about space, but how do you get there? Find out here.

With a radius of 3,959 miles, Earth is the fifth largest planet in our solar system, and it's the only one known for sure to have liquid water on its surface. Earth is also unique in terms of ...

treasure troves of precious metals and jewels, and extreme conditions that turn what we know here on Earth on its head. Here are some of the most dizzying facts about our solar system.