print email comment close Q&A: Dark Matter URL: http://chandra.harvard.edu/resources/faq/dmatter/dmatter-main.html Description: Questions and answers about this "term used to describe the mass in galaxies and clusters whose existence we infer from rotation curves and other techniques, but which has not been confirmed by observations on any electromagnetic wavelength." Topics include black holes, parallel universes, gravity, and more. Includes the related essay, "Dark Matter Mystery." From the Chandra X-Ray Observatory, operated for NASA by the Smithsonian Astrophysical Observatory. Publisher: Harvard-Smithsonian Center for Astrophysics; Chandra X-Ray Observatory Extra Keywords Einstein theory of relativity Library of Congress Subject Headings: Astronomy Dark matter (Astronomy) LII Database Information: Record 20630 created by Jennifer English on 02/13/2006 Last modification on 02/14/2006 Published: 02/16/2006   Funding agency: California State Library LII Item ID: http://lii.org/cs/lii/view/item/20630