3.15 Astro 1 Section 1 Professor Brandt

3.15 Astro 1 Section 1 Professor Brandt - Astro 1 Section 1...

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Astro 1 Section 1 Professor Brandt Monday March 15th 1999 Announcements: Lecture notes: Class 25 At 8 PM at night find North Star then turn around 180 degrees to see Orion - Rigel Betelgeuse Canis Major - with very bright star Sirius Canis Minor with Procyon Gemini - twins Castor and Pollux - in plane of ecliptic 2 planets discovered while in Gemini - Uranus (1781) Pluto (1930) Auriga - charioteer - named after mythical inventor of chariot. supposed to be his face - Capella is his eye. Quasars and Active Galaxies. This is a subject that Dr. Brandt spends much research time on. He is an X-ray astronomer and studies the giant black holes that we think powers quasars and active galaxies. Start by telling you what a quasar is and then we'll talk about the history of them and how they were discovered and our theories for how they work. Then we'll talk about active galaxies in general. Quasar - most luminous type of object in the Universe. Light comes from a very small point and looks like a star. Originally meant "quasi stellar radio source" - will explain this in a minute. We think it is the very center of a galaxy that has a big black hole in it - as the black hole swallows gas makes a great deal of radiation - very hot millions to billions of degrees.
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3.15 Astro 1 Section 1 Professor Brandt - Astro 1 Section 1...

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