1:1 solar system in the browser

It's a solar system at true scale with real ephemerides. VSOP87A plus a Chebyshev correction fitted against DE441, which drags Uranus from 5.58″ of error down to 0.009″. Worst case across eight planets at 1900, 2000 and 2050 is 0.369″. I spent an embarrassing amount of time on that correction and I'd do it again. Textures are streamed NASA/ESA/USGS tiles. The Moon goes to 0.325 m/px over the Apollo 12 landing site on LRO NAC, with the terrain actually displaced by LOLA elevation, not bump-mapped. 875,291 real stars, and the Milky Way behind them is a photometrically anchored plate. That last one had a 90° pole-axis error plus an east-west mirror for months and rendered 10-27x too faint in Sagittarius. I only caught it because I measured the rendered frame against the drawn star field instead of trusting my eyes. Self-imposed rule: nothing gets drawn that isn't measured, unless the screen admits it. Bodies use their own photometric function, not a cosine. Saturn's rings are Voyager PPS optical depth at 5 km. Black holes: Sagittarius A*, M87*, Cygnus X-1, with published masses and distances and their real error bars, asymmetric where the paper published them asymmetric. Two of the three say "not measured" under spin, because nobody has.