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The Stars of Skies Past
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Friday, July 14, 2006
11:11:00 AM EDT
Hearing Starlight -- Muse
Forgive me for getting a little astro-geeky here, but this is very cool: An online version of a celestial atlas from the 19th century astronomer Alexander Jamieson. These are lovely charts although not necessarily accurate any longer -- stars do drift, albeit so slowly we wouldn't notice in our lifetimes. But the older a star chart is, to more inaccurate it will be regarding the true positions of the stars (this is why star charts these day note their "epochs" -- meaning the year that the star positions are accurate for. Most current star charts are of the 2000 epoch, and astronomers can make calibrations from there).
That's probably more information than you need. Point is: Gorgeous.
Written by johnmscalzi Blog about this entry |
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11:11:00 AM EDT
Hearing Starlight -- Muse
The Stars of Skies Past
Forgive me for getting a little astro-geeky here, but this is very cool: An online version of a celestial atlas from the 19th century astronomer Alexander Jamieson. These are lovely charts although not necessarily accurate any longer -- stars do drift, albeit so slowly we wouldn't notice in our lifetimes. But the older a star chart is, to more inaccurate it will be regarding the true positions of the stars (this is why star charts these day note their "epochs" -- meaning the year that the star positions are accurate for. Most current star charts are of the 2000 epoch, and astronomers can make calibrations from there).
That's probably more information than you need. Point is: Gorgeous.
Written by johnmscalzi Blog about this entry |
Add to del.icio.us | digg this
This entry has 2 comments: (Add your own)
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Have you ever seriously looked at the night sky and been like "I see a bear," or am I the only one who doesn't see this stuff?
7/14/06 7:20 PM
Apparently I'm not the only one who looks up at the night sky and sees pictures or animals. I'm glad I'm not the only one. This is a great photo. I am glad you posted this. Thanks for sharing this. Take care and tell Athena someone from J-Land says hello. How is she by the way ?