Educational outreach, casual observing, and telescope control. Celestia (Best for Space Travel - Free):
A realistic 3D sky containing over 600,000 stars (expandable to 210 million). It includes constellation art for 40+ cultures and powerful search tools. download planetarium
Unlike earth-bound viewers, Celestia acts like a "spaceship simulator," allowing you to fly to any point in the solar system and view the universe from any angle. Celestia acts like a "spaceship simulator