Download Short-Period Comets

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Transcript
Comets
A comet is a small body of __________, rock and ____________ that follows a highly
_______________ orbit around the sun.
Hydrogen Envelope
Comets come from two regions of the solar
system, the _______________________ or
the ____________________.
Short-Period Comets
Short-period comets from the
___________________ come from
_________________ between objects.
Short-period comets take less than
_________ years to orbit the sun.
Short-period comets have a _____________ life span as they lose layers each time
they pass the ____________.
Long-Period Comets
Originate in the ______________________________, a spherical region that surrounds
the solar system and extends almost half way to the nearest star.
Long-period comets form when _____________________________________ or when
an objects in the Oort cloud is disturbed by the gravity of a nearby ___________.
Long-period comets can take up to __________________________________ to orbit
the sun.