本帖最后由 星辉 于 2009-2-27 09:38 编辑
"I couldn't detect the ion tail even in a deep 24-minute exposure," reports astrophotographer John Nassr, who took the picture on Feb. 24th from his private observatory in the Philippines.
For weeks, Comet Lulin has sported a wispy tail of electric-blue ionized gas emerging from the comet's head like a shock of unruly hair: image Today, that tail is gone.
23日拍摄的图片:Conrad Pope,
Photographed from Kelly, NC
Feb. 23, 2009
This is Comet Lulin around 11pm Feb 23, 2009. Photographed with a Tak FSQ refractor, using a Canon 5D MarkII, ISO 3200, 10, two minute exposures combined.
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John Nassr,
Baguio, Philippines
Feb. 23, 2009 |
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