astrophysics on theback of an envelope |
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Gravitational Lensing: what is the critical density? what is the magnification? What is the maximum radial drift that a solid body can have in a gaseous disc? What is dynamical friction? What is the deleceration caused by it? What is the power in gravitational waves by a black-hole binary? What is the maximum apparent velocity for a source in the sky? |
In this webpage, I and Elad Steinberg are collecting various analytical calculations that one may do to understand some astrophysical phenomena. The material shown here are mainly solutions to our Tuesday riddles, weekly problems that our Institute Faculty pose to post-docs and students after the Institute Seminar. |
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