A body of considerable mass that doesn't produce light on its own
and orbits a StaR
?. Until recently, only nine were known (all of
them in the SolarSystem
?). As of the begining of 2001, about 40
are known.
The planets of the Solar System (in increasing distance from the SuN?) are
MercurY?
VenuS?
MarS?
EartH
JupiteR?
SaturN?
UranuS?
NeptunE?
PlutO?
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