Oort cloud
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Oort cloud Definition
(n) (
astronomy
)
a
hypothetical
huge
collection
of
comets
orbiting
the
sun
far
beyond
the
orbit
of
Pluto
;
perturbations
(
as
by
other
stars
)
can
upset
a
comet
''
s
orbit
and
may
send
it
tumbling
toward
the
sun
Oort cloud Synonyms
Oort cloud
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