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Comets and asteroids
Online Explorations
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Myths vs realities
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Online Explorations
Fun, interactive ways to explore the universe
Comet Facts, Myths & Legends
Great balls of fire … er, ice! Explore comet facts and fantasies through the ages.
Resource Overview
Graphic Organizers
T-charts and Venn diagrams for at-a-glance comparisons of celestial objects
Legacy
Comparison of comets and asteroids
When is a comet not a comet? When it's an asteroid! Find out at a glance what makes these related space travelers different.
Resource Overview
Q&A
Commonly-asked questions about space and astronomy
Q&A: Comets
Satisfy your curiosity about the nature and behavior of comets.
Resource Overview
Fast Facts
Pictures and vital statistics for the planets and other celestial objects
Asteroid Eros
We landed a spacecraft on this asteroid when it passed close to Earth.
Resource Overview
Asteroid Ida
This crater-pocked asteroid has its own tiny moon.
Resource Overview
Asteroid Vesta
A massive impact with another object left Vesta scarred by a huge crater.
Resource Overview
Comet 9P/Tempel 1
NASA smashed a probe into this comet's core to study ancient material beneath its crusty skin.
Resource Overview
Comet Hale-Bopp
With a nucleus so huge and bright, even city-dwellers could see this one.
Resource Overview
Comet Halley
History's most famous comet also gives us one of our annual meteor showers.
Resource Overview
Myths vs realities
Common misconceptions about space. Each conceptual 'myth' is paired with the facts.
Comets
Comets always have tails — true or false?
Resource Overview
Star Witness news
Timely scoops from the Hubble Space Telescope's impressive array of discoveries
Legacy
An Icy Traveler Sweeps Past Mars
Legacy
Asteroid with Six Comet-like Tails Surprises Astronomers
Legacy
Dawn Spacecraft Will Go Asteroid-Hopping
Legacy
Hubble Witnesses Fireworks From Comet Collision
Legacy
Icy Visitor Makes First Appearance to Inner Solar System
Legacy
Returning Comet Holmes Dazzles Sky Watchers
Tales of ...
In-depth background information on interesting space phenomena
An asteroid disintegrating as Hubble watches
Even asteroids get 'burned' by the sun.
Resource Overview
Water-rich planetary building blocks found around white dwarf
An exoplanetary system that survived the burnout of its parent star may have contained Earth-like planets.
Resource Overview