This website, by Caltech astronomer Mike Brown, presents information on Sedna, an object believed to be from the Oort cloud. The site includes a description of the Oort cloud, a history of Sedna's discovery, and a...

This web page contains lecture notes about the early universe. It describes the conditions that allowed particles to evolve into large stars and galaxies. The information provided is well organized and it also provides...

Created by Mark Fisher of Glyph Web, this website is a reference guide to a wide range of astronomical objects. The site includes articles and images covering a wide range of cosmic phenomena. Some topics include:...

Welcome to the NASA/IPAC Extragalactic Database (NED). It is built around a master list of extragalactic objects for which cross-identifications of names have been established, accurate positions and redshifts entered to...

This slide set begins by discussing the amount of dark matter on galactic and larger scales by refering to the dark matter in the Milky Way. The next set of slides reviews the motivation for and the basic physics of...