Project guides that walk you through the science project process along with tips and ideas to get started. Shows how to turn a hobby into an enjoyable project.

A collection of resources relevant to the aerospace sciences, as well as some more generic resources intended for a broader audience.

A site for popularization of astronomy and astrophysics, useful for professional astronomers also.

Provides articles, reviews and tutorials, as well as historical information of interest to amateur astronomers and astrophotographers.

Directory dedicated to space sciences containing carefully selected links categorized in 22 sections: solar system, exobiology, stars, cosmology, etc.