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Look at Appendices in book.
- Earth moves in roughly circular path around the Sun.
Question: How long does it take?
- All objects in Solar System orbit the Sun.
- Distance to Sun: 93 million miles = 149.6 million kilometers = 17.7 years of
travel time in a Boeing 737. Mean distance from Earth to Sun defined as
astronomical unit.
Steve Spangler
Mon Aug 23 11:23:43 CDT 1999