One billion...

[社長]

收到美國攝影大師Adam Block一段文字，也是我希望在西藏拍到的：

viewtopic.php?f=29&t=2884&start=40#p20134

2008年到美國參加Lunt Solar Party時跟他有一面之緣：

viewtopic.php?f=13&t=609

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Hi,

People often ask how far can the telescope they are looking through "see." I usually answer by explaining how a telescope works by collecting light. However, lazier is to answer in general terms- "galaxies billions of light years away can be seen through this telescope..." And sure, I am often lazy!

However, the Corona Borealis Galaxy Cluster (Abell 2065) exemplifies the above answer and provides an inspiring view:

http://skycenter.arizona.edu/gallery/galaxies/abell2065

Although well known, there do not appear to be many high resolution color pictures of the field. This is not surprising. Nothing short of a space-based telescope is necessary to encompass this entire field and see details within these galaxies one billion light years away.

The only way to appreciate the above is by scrolling around the field:

http://skycenter.arizona.edu/sites/skyc ... ll2065.jpg

Enjoy galaxy hopping!
-Adam

P.S. This image may rank high for the greatest number of stars I have recorded in a single field. I will need to think about this a little more, but nothing else at the moment comes to mind.

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Adam Block