Jupiter Ring System Orbiting Neptune Asteroid Belt Kuiper Belt
Sputnik 1 WAC Corporal Explorer 1 V2 Missile
Deimos Leda Phobos Calypso
186 million km/second 149 million km/second 299 million km/second 93 million km/second
The Sagan Equation The Hoyle Equation The Hawking Equation The Drake Equation
7 9 3 5
Europa Titan Io Mars
Atlantis Enterprise Columbia Discovery
Callisto Titan Io Ganymede
Binary planets Twin systems Double planets Biplanetary systems