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Summary
Artist's conception of an extrasolar planet in orbit around a star that, according to current models, ought not be more than a million years old. This finding challenges every conventional concept of how long planets require to form in orbit around their stars.
Original Caption
In this artist's conception, a possible newfound planet spins through a clearing in a nearby star's dusty, planet-forming disc. This clearing was detected around the star CoKu Tau 4 by NASA's Spitzer Space Telescope. Astronomers believe that an orbiting massive body, like a planet, may have swept away the star's disc material, leaving a central hole.
The possible planet is theorized to be at least as massive as Jupiter, and may have a similar appearance to what the giant planets in our own solar system looked like billions of years ago. A graceful ring, much like Saturn's, spins high above the planet's cloudy atmosphere. The ring is formed from countless small orbiting particles of dust and ice, leftovers from the initial gravitational collapse that formed the possible giant planet.
If we were to visit a planet like this, we would have a very different view of the universe. The sky, instead of being the familiar dark expanse lit by distant stars, would be dominated by the thick disc of dust that fills this young planetary system. The view looking toward CoKu Tau 4 would be relatively clear, as the dust in the interior of the disc has fallen into the accreting star. A bright band would seem to surround the central star, caused by light scattered back by the dust in the disc. Looking away from CoKu Tau 4, the dusty disc would appear dark, blotting out light from all the stars in the sky except those which lie well above the plane of the disc.
Copyright status
This image is served on a site belonging to NASA and the Jet Propulsion Laboratory. Per JPL/NASA policy and applicable United States federal law, such images are in the public domain, or, if they are owned by individuals or institutions other than NASA or JPL, may be used for any journalistic, educational, or personal purpose (but not a commercial purpose) without further authorization. NASA and JPL images, other than their respective institutional logos, or photographs of actual persons, are not subject to copyright and may be used without additional permission, unless otherwise declared. For details, see the JPL Image Use Policy Declaration.
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| Date/Time | Thumbnail | Dimensions | User | Comment |
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| current | 02:42, 8 March 2008 |  | 1,600 × 1,200 (109 KB) | Temlakos | Artist's conception of an extrasolar planet in orbit around a star that, according to current models, ought not be more than a million years old. This finding challenges every conventional concept of how long planets require to form in orbit around their |
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