![]() ![]() Measuring longitude difference with the eclipse of Alexander the Great.Estimating the distance to the Moon (Hipparchus).Estimating the size of the Moon (Aristarchus).Estimating the distance to the Sun (Aristarchus).Estimating the circumference of the Earth (Posidonius).Estimating the circumference of the Earth (Eratosthenes).Before checking out the activities please have a look at the Introduction, here.Īll materials are licensed under a Creative Commons Attribution 4.0. ![]() All materials are based on the Stellarium software and have been designed by Dr Vassilios Spathopoulos who was generously funded by the Anthony Waterhouse Fellowshipscheme of the Institute of Physics, UK. ![]()
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