[ugssshnh] Homemade neutrino detector

Could one observe the neutrinos produced by a realistically nearby core collapse supernova with a homemade neutrino det

[fwuecmvk] Light second

Consider dropping the meter as the SI unit of length and replacing it with the light second (with various SI prefixes).

[qupgtxbw] Ray tracing with conic sections

The Zen Photon Garden has a single point light source and partially transparent flat mirrors, everything in 2D. Other

[fesempuw] Seasonal lag and astronomical seasons

It seems strange that the day with the most sun, the summer solstice, is marked as the beginning of summer and not the

[awsnmpou] Angular diameters of 2 supermassive black holes

Previously: Schwarzschild radius formula, noting that event horizon radius is proportional to mass.Sagittarius A* at th