•Different
phenomena produce different wavelength waves
–Ordinary
stars: Visible light
–Cool
planets or dust clouds: Infrared
light
–Moving
charged particles, cool molecules:
Radio waves
–Very
hot objects: X-Rays and Gamma
Rays
–Quasars:
ALL wavelengths
–
•Only
visible, some IR, and radio make it through atmosphere
–Need
to observe from space for other wavelengths
–
–
•Going
into space also lets you obtain more detailed images
–On
Earth telescope size isn’t only limit on image resolution
–Temperature
fluctuations in atmosphere cause “seeing” (blurring)