Separate fact from fiction and satisfy your
curiosity about the nature and behavior of comets.
Myths vs. realities:
Comets always have tails true
When is a comet not a comet? When it's an asteroid!
Find out at a glance what makes these related space travelers
NASA crashed a probe into this comet to study
ancient material released from its core.
NOTE: For more Fast Facts
on other comets and asteroids, dig deeper…
Deeper continued >>