Space Travel
History of Solar System Understanding How do we know the Earth goes around the Sun?
Remote Worlds Chapter Fourten. ASTR 111 – 003 Fall 2007 Lecture 12 Nov. 19, 2007 Introducing Astronomy (chap. 1-6) Introduction To Modern Astronomy I:
Planetary Rings. Rings are swarms of orbiting particles Orbits have to be very circular Elliptical orbits will result in collisions, destroying the ring.
The Outer Worlds. Update! International Astronomical Union (IAU) voted on the re- definition of planets in Prague on Aug. 24, 2006. Pluto is no longer.
The Outer Worlds
