At this website, the European Space Agency (ESA) offers colorful images and straightforward descriptions of its Earth monitoring research which is intended to help to understand Earth, conserve the environment, mitigate...

This web page provides milestones of the European Space Agency's first space probe to the moon. The ESA's ion driven SMART-1 probe entered lunar orbit on 2004 Nov 16 after an 80 million kilometer, 13 month journey. ...

The European Space Agency's homepage provides information on the ESA's telecommunications, navigations, Earth observations, human spaceflight missions, launches, space science, technology, industry, space operations,...

Authored and curated by David P. Stern, this is a lesson plan for teaching frames of reference. It is linked to text material on reference frames, aberration of light, and a very short introduction to the foundations of...

This site is a collection of lecture notes for a course called the universe of galaxies. These notes discuss the integrated properties, classification, stellar and gaseous content of galxies; galaxies within, gasesous...