SpaceEngine - a free space simulation program that lets you explore the universe in three dimensions, from planet Earth to the most distant galaxies. Areas of the known universe are represented using actual astronomical data, while regions uncharted by astronomy are generated procedurally. Millions of galaxies, trillions of stars, countless planets - all available for exploration. You can land any planet, moon or asteroid and watch alien landscapes and celestial phenomena. You can even pilot starships and atmospheric shuttles.
Procedural animated star coronas. WIP.
Time flow is accelerated 10,000 times for main sequence stars, 100,000 times for giants, 30 times for white dwarf and 0,01 times for neutron star.