Thursday, 10/11/07

STUDY QUESTIONS AND DEFINITIONS

Red Shift (remember the Doppler Effect in hearing a train)
How do we know the universe is expanding?
ROYGBIV
red orange yellow green blue indigo violet
Electromagnetic spectrum: radiowaves - microwaves - infrared radiation - visible light - ultraviolet radiation - Xrays - Gamma Rays
con stell ations
circumpolar constellations
absolute brightness
apparent brightness
parallax
Proxima Centauri is the next most proximate star, 4.2 light years or 40 trillion kilometers away. How many miles is that?

visit this site:
http://hubblesite.org/newscenter/archive/releases/1995/24