COMETS, ASTEROIDS, AND METEOR Flashcards
are loose
collections of ice,
dust, or rock
particles whose
orbits are usually
very long, narrow
ellipses. You can
think of a as
a “dirty snowball.”
Comets
parts of a comet
nucleus
coma
tail
what does the name comet mean in Greek
“long haired star
how does a comet’s tail form
As a comet approaches the sun and heats up, some
of the gas and dust stream outward, forming a tail.
how many tails do comets have and what are they called
2
gas and dust tail
how long is a comet’s tail
100 million kilometers long.
where are most comets found
Most comets are found in one of two
distant regions of the solar system- the
Kuiper belt and the Oort cloud.
is a doughnut shaped region
that extends from beyond Neptune’s orbit to
about 100 times Earth’s distance from the sun.
The Kuiper belt
is a spherical region of
comets that surrounds the solar system out to
more than 1000 times the distance between
Pluto and the sun.
The Oort cloud
are rocky
objects in space that
are too small and
numerous to be
considered real
planets. Most
revolve
around the sun
between the orbits of
Mars and Jupiter. This
region of the solar
system is called the
Asteroids
asteroid belt