Neutron Stars
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In order to understand “where we come from”, we must understand the evolutionary history of life, and in order to understand that, we must understand the physical history of the earth, and in order to understand that, we must understand its history in the solar system, and in order to understand that….you get the idea. So, to start the course we will go all the way back to the origin of the universe. At the time of the Big Bang, words ...more
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Doppler Effect, Binary Stars, Neutron Stars and Black Holes. Doppler shift is introduced with sound waves, then extended to electromagnetic waves (radiation). The Doppler shift of stellar spectral lines and/or pulsar frequencies provides a measure of the line-of-sight (so-called radial) velocity of the source relative to the observer. Combined with Newton's law of universal gravitation, this can lead to the orbital parameters and the mass ...more
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The Big Bang created the physical universe. Of course life is part of this physical universe, but the immediate building blocks of life are chemicals. Before the Big Bang, words such as “time” had no meaning, but even in the first few minutes there could be no chemistry since there were no atoms. The nuclei of some of the lighter elements formed within minutes, atoms some time later, and elements heavier than lithium were forged in the sup...more
