2
Advantages of
Space
•Different phenomena produce different
wavelength light
–Ordinary stars: Mostly Visible light
–Cool planets or dust clouds: Infrared light
–Moving charged particles, cool molecules: Radio/millimeter waves
–Very hot objects: X-Rays and Gamma Rays
–Quasars: ALL wavelengths
•Only
some wavelengths of light can pass through Earth’s atmosphere: The so-called atmospheric “windows”
•Radio waves
•Microwaves
•Infrared
•Visible
•Ultra-violet
•X-Rays
•Gamma rays