[sfevents] Fwd: [SFAA-ANNOUNCE] SFAA Member Meeting and Lecture, Wed. Oct. 15

[Michael Portuesi]

A reminder that this Wednesday, October 15, at 7:30 PM, is the SFAA  
General Meeting and Lecture at the Randall Museum.

Dr. Christopher Mauche of the Lawrence Livermore National Laboratory  
will present a talk on "The X-Ray Universe"

"Although physicists and physicians have utilized X-rays since their  
discovery in 1895, that window of the electromagnetic spectrum was  
closed to astronomers until they had access to space, first with  
sounding rockets and then with satellites. Progress in the field of X- 
ray astronomy has since been rapid: in 1962 a single cosmic X-ray  
source was known, while in 1999 the number had increased to nearly  
19,000. The speaker will give a general overview of the many different  
--- but (almost) always extremely hot, violent, and variable
--- sources that populate the X-ray sky: our Sun and other stars, X- 
ray binaries, supernova remnants, galaxies, clusters of galaxies, and  
million- to billion-solar-mass black holes, stressing how different  
the Universe appears in X-rays, compared to what we know about it from  
the optical."

For more information, please visit the SFAA website:  www.sfaa-astronomy.org