Wednesday September 19, 2012

1. WednesdaySeptember 19, 2012 (Properties of Stars; Video – HTUW: Extreme Stars – A Star is Born)

2. The Launch Pad Wednesday, 9/19/12 What is the trend as stars become larger? What is the trend as stars become hotter?

3. Announcements • None Today

5. Recent Events in Science Endeavour Takes Off From Florida on Ferry Flight Read all about it! http://www.nasa.gov/mission_pages/shuttle/main/index.html ?? The Shuttle Carrier Aircraft carrying Endeavour left NASA's Kennedy Space Center this morning en route to Houston, with flyovers of the Florida's Space Coast, NASA's Stennis Space Center and NASA's Michoud Assembly Facility along the way. Endeavour later heads to NASA's Dryden Flight Research Center and then on to Los Angeles, where it will eventually move to the California Science Center. 

6. Properties of Stars The Color and Temperature of Stars • Cool Stars • Stars with a temperature less than 4 000 Kelvins emit longer-wavelength light and appear red. • Medium Temperature Stars • Stars with a temperature between 5 000 and 6 000 Kelvins emit medium-wavelength light and appear yellow, like our Sun. Hot Stars • Stars with a temperature above 10 000 Kelvins emit short-wavelength light and therefore appear blue.

7. Properties of Stars The Constellation of Orion • Betelgeuse: Temperature - 3,140 to 3,641 K; Distance - 640 LY; Radius – 950 to 1200 R • Our Sun: Temperature – 5778 K; Distance - 8 LM; Radius - 1 R • Rigel: Temperature – 12, 130 K; Distance - 860 LY; Radius - 74 R Orion nebula star factory

8. Properties of Stars Binary Stars and Stellar Mass Binary stars are two stars orbiting one another and held together by mutual gravitation. Both stars orbit around a common center of mass.

9. Video Segment How the Universe Works: Extreme Stars A Star is Born