My Observation in Astronomy



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2001”NŽ‚ŽqÀ—¬¯ŒQoŒ»Œ‹‰Ê

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DPLŒ^•ªŒõŠí

LPS-P1 vs NBN-PV filter

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Light Pollution in Tucson

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•ªŒõŒv(in Japanese) Spectroscope(in English)


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