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nucleus
the rocky part of a comet's head
craters
deep holes in the surface of a comet
Sun
the thing that comets orbit
light
comets look like streaks of this from Earth
astronomer
a scientist who studies space
Kuiper
the belt where comets are located
probes
machines designed to study faraway objects in space
coma
the cloud of gas surrounding a comet's nucleus
telescopes
tools used to study asteroids
meteroids
small chunks of rock that break away from an asteroid
asteroid belt
a part of space with many asteroids
Ceres
the largest and first asteroid discovered
carbon
around 75% of asteroids are this type
meteorites
pieces of rocks that hit the Earth
meteor shower
many meteors falling through the sky
iron
this type of meteor is shiny
