This resource covers Seyfert galaxies, radio galaxies, BL Lacertae (BL Lac) objects, quasars, supermassive black holes, determining masses in galactic centers using the virial theorem, and a model for active galactic...

Through its extensive interactive website, educational programming, shows, exhibits, planetarium, online science, research and collections, the Adler Planetarium and Astronomy Museum aims to inspire the next generation...

This site from National Aeronautics and Space Administration provides information about aerogel, a material used by the Stardust probe to trap particles from the Comet Wild 2. The collection strategies, the unique...

This webquest introduces students to the processes of star and planet formation and the search for life on other worlds. Materials include slide shows with written narrative that explain the birth and life cycles of...

This site explains why three percent is a fundamental limit of X-ray detectors that use the conventional method of conversion to electric charges, and if a higher spectral resolution is required astronomers have to...