Image:HD 107146 falsecolour.jpg

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Description

en:False colour image of en:HD 107146, showing en:protoplanetary disc, taken by en:Hubble Space Telescope.

(source [1])

Caption released with image:

This is a false-color view of a planetary debris disk encircling the star HD 107146, a yellow dwarf star very similar to our Sun, though it is much younger (between 30 and 250 million years old, compared to the almost 5 billion years age of the Sun). The star is 88 light-years away from Earth. This is the only disk to have been imaged around a star so much like our own. The slight difference in brightness on one side of the disk is due to the fact that small dust particles scatter more light when they are between Earth and the star, rather than behind the star. This suggests that the bright side is closer to us. The disk is redder than the star whose light it reflects, indicating that it contains grains one two-thousandth of a millimeter in size (about 100 times smaller than household dust).
Our Sun is believed to have a ring of dust around it, lying just beyond the orbit of Neptune, although it is ten times narrower than the one around HD 107146. Our solar system also has between 1,000 and 10,000 times less dust. The size of the ring, its the thickness, and the amount of dust make it unlikely that HD 107146 will ever evolve into a system like our own. This is interesting, as it shows that the planetary systems around the same kind of stars may have very different evolutionary paths.
Source

Originally from en.wikipedia; description page is/was here.
Date

2005-03-01 (original upload date)
Author

Original uploader was DarkHorizon at en.wikipedia
Permission

PD-LAYOUT; PD-USGOV-NASA.

[edit] License information

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Warnings:

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  • Materials from the Hubble Space Telescope may be copyrighted if they do not explicitly come from the STScI. [2]
  • All materials created by the SOHO probe are copyrighted and require permission for commercial non-educational use. [3]
  • Images featured on the Astronomy Picture of the Day (APOD) web site may be copyrighted. [4]


[edit] Original upload log

(All user names refer to en.wikipedia)

  • 2005-03-01 20:00 DarkHorizon 800×800×8 (96064 bytes) [[False colour]] image of [[HD 107146]], showing [[protoplanetary disc]], taken by [[Hubble Space Telescope]]. {{PD-USGov-NASA}} (source [http://www.nasa.gov/images/content/103363main_hubble-dust-browse.jpg NASA image number 103363])

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Metadata

This file contains additional information, probably added from the digital camera or scanner used to create or digitize it. If the file has been modified from its original state, some details may not fully reflect the modified image.

Orientation Normal
Horizontal resolution 72 dpi
Vertical resolution 72 dpi
Software used Adobe Photoshop CS Windows
File change date and time 15:44, 6 December 2004
Color space 65535
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