Physithon - Astrophysics & Space

Journey through the cosmos — from stellar physics and nuclear fusion in stars, to galaxy formation, large-scale cosmic structure, and modern cosmology. This collection covers stellar evolution and the Hertzsprung-Russell diagram, black holes and neutron stars, the expanding universe and dark energy, observational techniques (telescopes, spectroscopy, gravitational wave detection), and planetary science including exoplanet detection methods. Built for aspiring physicists preparing for advanced competitions.