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Fil:A Distant Planetary System.jpg

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Beskrivelse

Beskrivelse

This artist's concept depicts a distant hypothetical solar system, similar in age to our own. Looking inward from the system's outer fringes, a ring of dusty debris can be seen, and within it, planets circling a star the size of our Sun.

This debris is all that remains of the planet-forming disk from which the planets evolved. Planets are formed when dusty material in a large disk surrounding a young star clumps together. Leftover material is eventually blown out by solar wind or pushed out by gravitational interactions with planets. Billions of years later, only an outer disk of debris remains.

These outer debris disks are too faint to be imaged by visible-light telescopes. They are washed out by the glare of the Sun. However, NASA's Spitzer Space Telescope can detect their heat, or excess thermal emission, in infrared light. This allows astronomers to study the aftermath of planet building in distant solar systems like our own. [1]
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The original uploader was 1981willy at engelsk Wikipedia.

Later versions were uploaded by WilyD at en.wikipedia.

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Public domain This file is in the public domain in the United States because it was solely created by NASA. NASA copyright policy states that "NASA material is not protected by copyright unless noted". (See Template:PD-USGov, NASA copyright policy page or JPL Image Use Policy.)
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The original description page was here. All following user names refer to en.wikipedia.
  • 2007-06-05 19:44 WilyD 3000×1688×8 (308096 bytes)
  • 2007-06-05 04:01 1981willy 455×256×8 (10167 bytes)

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nåværende28. aug. 2007 kl. 12:59Miniatyrbilde av versjonen fra 28. aug. 2007 kl. 12:593 000 × 1 688 (301 KB)Liftarn{{Information |Description= Courtesy NASA/JPL-Caltech Oh yes, it's found here [http://photojournal.jpl.nasa.gov/catalog/PIA07096] |Source=Originally from [http://en.wikipedia.org en.wikipedia]; description page is/was [http://en.wikipedia.org/w/index.php

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