Positions are Keplerian approximations from JPL planetary elements, valid from 3000 BCE to 3000 CE; when served by the backend, exact JPL DE441 positions replace them. Dates are proleptic Gregorian, in UT; year 0 is 1 BCE. Planets are tilted to their IAU pole directions; radial distances are compressed unless true scale is on. The Moon is drawn at a distance relative to Earth's size (60 Earth radii in true-size mode), not to the AU scale, which would put it inside the globe. The major moons of Mars, Jupiter, Saturn, Uranus, Neptune and Pluto appear as you zoom in on their planet and are placed the same way, relative to the planet's drawn size. Earth wears NASA Blue Marble imagery (public domain, served from the three.js repository) once it has downloaded, and turns with the real Greenwich sidereal time and the precessing pole of date, so the geography under the Sun is right for any date in range. The Moon wears NASA's Lunar Reconnaissance Orbiter colour mosaic with LOLA relief (CGI Moon Kit, NASA Scientific Visualization Studio, public domain) and turns with the IAU rotation model, so the familiar near side faces Earth, rocking with its real libration.