Taken by fire ball of perseid on August 12, 2017 @ alxa,china
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  Camera Used: Canon Canon EOS 6D
Exposure Time: 10/1
Aperture: f/2.2
ISO: 3200
Date Taken: 2017:08:13 00:42:19
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moon made the beautiful blue night sky. Perseid fireballs showed different appearance with colorful spectra lines.We use 50mm lens with prism to find why Perseid meteor are so beautyful. From the spectra we can find Mg 518nm ´╝łgreen line), Na 589nm (orange line) and Fe line (blue lines). surperingly, we can find the spectra changing when it pass through the sky. Mg 518nm appeared firstly, as red lines following´╝î which well explan why the meteor of perseid so colorful.
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