Tag Archives: Virial theorem

Protostar Formation – Infographic

Took me a while to do that. I hope that you like what I did. In some respects, I am not happy. I wanted to fit much, much more info. But I saw very soon that that was not going to … Continue reading

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Energy Sources and Luminosity

Where does the energy emitted by a star come from? One source is obviously gravitational potential energy U. If r decreases, U decreases too, and can be converted into radiated energy. However, because of the Virial Theorem (E = <U>/2) only 1/2 of … Continue reading

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Kepler’s Laws Revisited

Previous: Ellipse Kepler thought that, in the Solar System, the planets rotate in elliptical trajectories with the center of the Sun in one focus. Newtonian mechanics unveiled that Kepler’s assumption was not fully correct. The Sun is not located in … Continue reading

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