Learn about the anatomy of the solar system! Planets, Comets, Moons, Asteroids, and the Sun. You can learn the diameter, axis tilt, rotation time, surface temperature, and core temperature of the sun; the perihelion, aphelion, diameter, axis tilt, orbit time, rotation time, moons, atmospheric composition, distance from the Sun, and temperature of the planets, comets, and asteroids; the axis tilt, orbit time, rotation time, atmospheric composition, diameter, and temperature of the moons. For a planet and the sun, tap on a button and you can view a cross section of the entity. Accompanying each celestial entity, there are beautiful images from NASA and ESA that look stunning on the Retina Display.