Dear Colleagues, Because it is so marvelously done and so informative, I am adding a link to your Sco X-1 Annotated Guide (and associated movie) at http://www.aoc.nrao.edu/pr/scox1/scox100.htm I certainly hope that it remains available for a long time for our astronomy students to view and study. This is a superb teaching resource on neutron star binaries and their emissions. However, one thing about your graphics and text stunned me. You used "billions of miles" as the scaling units for the graphics and in your discussion! Why on Earth (or elsewhere) did you not use terameters? (Or, as accepted by the IAU but less universally well known among non-astronomers, astronomical units--or even parsecs?) I realize that at these scales, the size of the field of view is outside human experience, but "miles" must seem now to be almost as anachronistic to 95% of the people of the world as do "leagues". We science educators in the United States work hard to teach our students that scientists use the SI and this makes our task a bit more difficult. If the site weren't so tremendously valuable and unique, your unit choice would have kept me from posting a link to it. Except for that oddity, well done and thank you for making this resource available. regards, James R. Frysinger -- James R. Frysinger University/College of Charleston 10 Captiva Row Dept. of Physics and Astronomy Charleston, SC 29407 66 George Street 843.225.0805 Charleston, SC 29424 http://www.cofc.edu/~frysingj [EMAIL PROTECTED] Cert. Adv. Metrication Specialist 843.953.7644
