Radioastronomy and Modern Cosmology
The electromagnetic radiation that comes from space covers all wavelengths from gamma rays to radio waves (Fig. 9.1). Much is stopped by water vapor and by gases like oxygen (O2), ozone (O3), and nitrogen (N2) in the atmosphere, Earth’s blanket and umbrella, which extends more and more rarefied to at least 1000 km. Beyond there is extreme cold, harmful radiation, and silence.
KeywordsNeutron Star Radio Wave Cosmic Microwave Background Radio Emission Radio Source
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