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Icy Travelers
Comets are cosmic snowballs of frozen gases, rock and dust roughly the size of a small town. When a comet's orbit brings it close to the sun, it heats up and spews dust and gases into a giant glowing head larger than most planets. The dust and gases form a tail that stretches away from the sun for millions of kilometers.

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Jovian planet

Planet with a large diameter and low density. In our solar system the Jovian planets are: Jupiter, Saturn, Uranus and Neptune.

JPL

Acronym for NASA's Jet Propulsion Laboratory in Pasadena, Calif.

Jupiter
Jupiter is the fifth planet from the sun. It is the largest planet in our solar system. It is named for the king of ancient Roman gods.
HREF="../planets/profile.cfm?Object=Jupiter">More on Jupiter >>

Jupiter
 
Can't find it? Don't understand it? Ask us.
Q
Jovian planet

Planet with a large diameter and low density. In our solar system the Jovian planets are: Jupiter, Saturn, Uranus and Neptune.

JPL

Acronym for NASA's Jet Propulsion Laboratory in Pasadena, Calif.

Jupiter
Jupiter is the fifth planet from the sun. It is the largest planet in our solar system. It is named for the king of ancient Roman gods.
HREF="../planets/profile.cfm?Object=Jupiter">More on Jupiter >>

Jupiter