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

The area near clouds is often classified as ‘clear sky’, but a new study demonstrates the potential biases of misclassifying ...

And you can test what you've learned with some activities! If you look up on a clear day the sky is bright and you can see the Sun. You should never look at the Sun directly. It can damage your eyes.