With Dr. Roger Romani (Stanford University): NASA's Fermi Gamma-ray Space Telescope has revealed a violent high-energy universe full of stellar explosions, black hole jets, and pulsing stars.  These cosmic objects are often faint when observed with visible light, but glow bright with gamma rays.   Dr. Romani describes the quest to discover the true nature of the most puzzling of these gamma-ray sources.  Several turn out to be a kind of bizarre star corpse called a 'black widow' pulsar -- where a dead star has a companion that it is slowly destroying. This is a talk from 2014, but it is still relevant today.

With Dr. Roger Romani (Stanford University): NASA's Fermi Gamma-ray Space Telescope has revealed a violent high-energy universe full of stellar explosions, black hole jets, and pulsing stars. These cosmic objects are often faint when observed with visible light, but glow bright with gamma rays. Dr. Romani describes the quest to discover the true nature of the most puzzling of these gamma-ray sources. Several turn out to be a kind of bizarre star corpse called a 'black widow' pulsar -- where a dead star has a companion that it is slowly destroying. This is a talk from 2014, but it is still relevant today.

With Dr. Roger Romani (Stanford University): NASA's Fermi Gamma-ray Space Telescope has revealed a violent high-energy universe full of stellar explosions, black hole jets, and pulsing stars.&nbsp; These cosmic objects are often faint when observed with visible light, but glow bright with gamma rays. &nbsp; Dr. Romani describes the quest to discover the true nature of the most puzzling of these gamma-ray sources.&nbsp; Several turn out to be a kind of bizarre star corpse called a 'black widow' pulsar -- where a dead star has a companion that it is slowly destroying. This is a talk from 2014, but it is still relevant today.

Black Widow Pulsars: The Vengeful Corpses of Stars

Listen to exciting, non-technical talks on some of the most interesting developments in astronomy and space science.  Founded in 1999, the Silicon Valley Astronomy Lectures are presented on six Wednesday evenings during each school year at Foothill College, in the heart of California's Silicon Valley. Speakers include a wide range of noted scientists, explaining astronomical developments in everyday language. The series is organized and moderated by Foothill's astronomy instructor emeritus Andrew Fraknoi and jointly sponsored by the Foothill College Physical Science, Math, and Engineering Division, the SETI Institute,  the Astronomical Society of the Pacific, and the University of California Observatories (including the Lick Observatory.)

Science

Astronomy

Listen to exciting, non-technical talks on some of the most interesting developments in astronomy and space science. Founded in 1999, the Silicon Valley Astronomy Lectures are presented on six Wednesday evenings during each school year at Foothill College, in the heart of California's Silicon Valley. Speakers include a wide range of noted scientists, explaining astronomical developments in everyday language. The series is organized and moderated by Foothill's astronomy instructor emeritus Andrew Fraknoi and jointly sponsored by the Foothill College Physical Science, Math, and Engineering Division, the SETI Institute, the Astronomical Society of the Pacific, and the University of California Observatories (including the Lick Observatory.)

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Black Widow Pulsars: The Vengeful Corpses of Stars

Black Widow Pulsars: The Vengeful Corpses of Stars

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