ASTR 001 Lecture Notes - Lecture 8: Electromagnetic Spectrum, Radiography, Electromagnetism
Document Summary
Observi(cid:374)g proble(cid:373)s due to earth"s at(cid:373)osphere: light pollution, turbulence causes twinkling= blurs images, atmosphere absorbs most of em spectrum, including all uv and x-ray, most infrared. Telescopes collect more light than our eyes (light-collecting area) Telescopes can see more detail than our eyes (angular resolution) Telescopes/instruments can detect light that is invisible to our eyes (e. g infrared, ultraviolet) Our atmosphere absorbs all x-rays, almost all uv, almost all infrared, and some radio light. To observe these telescopes, one can either observe from space Bigger telescopes are better: more collecting area = more sensitivity, higher resolving power. Scintillating seeing objects move on the sky. High elevations or space missions can circumvent some of these problems. Arrays of telescopes can obtain the resolving power of large diameter telescopes without the large single dish. Pluto (about 2000 km across: exceptions to the rules. Condensation- elements and compounds began to condense (i. e. solidify) out of the nebula depending on the temperature.
