SP-345 Evolution of the Solar
System
FIGURE 8.3.1.- A planet at
O has
two orbiting satellites, one of small mass (M2) moving in a
circular orbit and one of negligible mass (M1) moving in an
elliptic orbit. The orbital inclinations are zero and the ratio of
average angular velocities 
is near 2; 
and 
. A1 is the apocenter
of the inner satellite, and P1 is the
pericenter.
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