simulate your own star, add planets, simulate the phases, and even explode the star!? there are questions at first to set the starting color,size,and luminosity. color: 0 to 200 size: 10 to 700 luminosity: -100 to 100 l and b for luminosity c and a for colors t,v,u, and spacebar for size p to pulse n, s, and e to supernova: n for black hole explosion s for neutron star explosion e for nothing left after r for red giant or blue dwarf or wolf rayet o for AGB m for planetary nebula (in AGB) arrow keys to move eyes number keys,q,w,k,h,f, and d for face change you can drag star and planets you can auto simulate click the "build" button to load a type there are now habitable planets and the habitable zone.
I'm sorry guys but the star doesn't work anymore so this will be unplayable until I fix it but it'll probably take a long time because I'm going to be busy