Earth science, also known as geoscience, is the study of Earth as a system and all its component parts. Geophysics, oceanography, atmospheric science, geology and more all fall within its purview. There’s no need to be overwhelmed, however. Earth science inspires some of its brightest minds to share their enthusiasm and expertise online. This Earth Science Web Guide
showcases the best sites to explore the sky above you and the depths beneath your feet. Educators: Sign up for our education newsletter.