This 2-page color fact sheet briefly describes NASA-s Kepler mission, its instruments, and ground system. Also included are tables listing the instrument parameters and a listing of the major institutions involved....

This website, from the National Radio Astronomy Observatory (NRAO), is an image gallery of the enormous mass at the center of the Milky Way galaxy. Each image is accompanied by a several-paragraph explanation. Links to...

Of the 100 billion or more galaxies visible through existing telescopes, most are either spiral or elliptical in shape and about one-fourth are irregular in shape. In addition to their shape, star systems can be further...

This website, created by Aspire, provides an interactive tutorial on the evolution of stars. It integrates activities, graphs, quizzes, and animations to aid student learning. It begins with proto-stars, then provides...

This page from then University of California, Los Angeles Galactic Center Group provides images of the galactic center over most of the electromagnetic spectrum. Each image has explanatory text, and a background section...