Notes:
- One Astronomical Unit (A.U.) equals the
distance between the Earth and our Sun.
- Note the 20 Multiple-Planet Systems:
GJ 876, 55 Cancri, HD 37124, HD 12661, 47 Ursae Majoris, HD 168443,
HD 82943, HD168443, HD74156, HD 160691, 217107, HD 190360, HD 38529, HD 73526, HD 202206, HD 108874, HD 128311,
HD 69830, HIP 14810, HD 187123, and Upsilon Andromedae.
Upsilon Andromedae
is the first known multiple-planet
system, announced
April 15, 1999.
- Masses are measured in jupiters. One
Jupiter mass (1 MJ) equals
318 Earths.
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