SP-345 Evolution of the Solar
System
FIGURE 23.5.1.- Ratio between the
orbital period TK
of secondary bodies and the spin
period ![[Greek letter] tau](p541.11.jpg)
of the central body. The latter quantity may have
changed for the Sun, but not for the planets. The secondaries are
grouped according to the cloud in, which they formed. From left to
right are the terrestrial planets, the giant planets, outer Saturnian
satellites, Galilean satellites of Jupiter. the Uranian satellites,
and the inner satellites of Saturn (From Alfvén, 1962.)
- Back -