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Purple haze of stars at night greeting card
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  • Card: Front
    Front
  • Card: Inside (Left)
    Inside (Left)
  • Card: Inside (Right)
    Inside (Right)
  • Card: Back
    Back
About this product
Size: Greeting Card

Keep in touch with Zazzle custom greeting cards. Customize all parts of this folded card – inside and out, front and back – for free!

  • Dimensions: 5" x 7" (portrait) or 7" x 5" (landscape).
  • Printed on ultra-heavyweight (120 lb.) card stock with a gloss finish.
  • Each card comes with a white envelope.
  • No minimum order.
  • May be available on Note Card size
  • Designer Tip: To ensure the highest quality print, please note that this product has multiple customizable design areas:
    • Front: 5" x 7" (portrait) or 7" x 5" (landscape).
    • Inside (top/left): 5" x 7" or 7" x 5" .
    • Inside (bottom/right): 5" x 7" or 7" x 5".
    • Back: 3" x 4" or 4" x 3".
About this design
Purple haze of stars at night greeting card
A massive cluster of galaxies located about 2.3 billion light years away, Abell 1689, shows signs of merging activity. Hundred-million-degree gas detected by NASA's Chandra X-ray Observatory is shown as purple in this image, while galaxies from optical data from the Hubble Space Telescope are colored yellow. The X-ray emission has a smooth appearance, unlike other merging systems such as the Bullet Cluster or MACS J0025.4-1222. The temperature pattern across Abell 1689 is more complicated, however, possibly requiring multiple structures with different temperatures. The long arcs in the optical image are caused by gravitational lensing of background galaxies by matter in the galaxy cluster, the largest system of such arcs ever found. Further studies of this cluster are needed to explain the lack of agreement between mass estimates based on the X-ray data and on the gravitational lensing. Previous work suggests that filament-like structures of galaxies are located near Abell 1689 along our line-of-sight to this cluster, which may bias mass estimates using gravitational lensing.
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Purple haze of stars at night greeting card

$3.30 per card
Artwork designed by Nasaworld. Made by Zazzle Greeting Cards in San Jose, CA. Sold by Zazzle.
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5 star:
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4 star:
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2 star:
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1 star:
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99% reviewers would recommend this to a friend
This product is most recommended for Christmas
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Other Info

Product ID: 137824503620486324
Created on: 3/1/2011 9:18 AM
Reference: Guide Files