Starry Night Galaxy Explorer (PC & Mac) [Old Version] Pilot a starship through intergalactic space for an out-of-this world adventure See 28,000 galaxies in 3D as calculated by astronomer Brent Tully Learn more about the universe through SkyGuide's interactive, multimedia tours Examine the structure of the universe from up to 700-million light years away Experience space outside the Milky Way; stay current with online updates