Wednesday, October 17, 2012

Beware the Rings of Pluto

Trojans don't count in the same way that moons don't count. Basically, the definition of "cleared the neighborhood" means that anything left is dominated by the gravitational influence of the planet. Moons orbit the planet, Trojans orbit the Lagrange points.

Another similar class of objects are those in orbital resonance with the planet. The Pluto/Neptune system, for example. Or Cruithne/Earth. The planet's gravity dominates in each case, so we're OK there.

The term "cleared the neighborhood" is unfortun

Source: http://rss.slashdot.org/~r/Slashdot/slashdotScience/~3/vvM5GkburEA/beware-the-rings-of-pluto

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