preparation materials
Celestial mechanics — Basic problems 1
celestial mechanicsIntroductionHere are some basic celestial mechanics problems about the gravitational law, Kepler's laws, and escape velocity. After solving them, you can check your solutions below.
The celestial sphere
celestial sphereIntroductionLooking up at the night sky, you might get the impression that the stars are all at the same distance from you as if they were on the surface of a sphere. This imaginary sphere is called the celestial sphere. Although we know that the stars...
Theory problems and solutions from Thailand 2007
IOAA problemsIntroductionThe very first IOAA took place in Chiang Mai, Thailand in 2007. 21 countries competed. You can find the archived website of the competition here. If you find these problems too hard, you might want to start with some of our easier problems,...