tom6740: New Moon
tom6740: 极光 Aurora
tom6740: Enginfield Observatory
tom6740:
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tom6740: Mammatus Clouds
tom6740: Sun Halo
tom6740: Circumzenithal Arc
tom6740: A Camelopardalid meteor and one of its prediction makers...
tom6740: Observing Venus Transit '04 at Chaqiding
tom6740: Venus Transit '04
tom6740: Total solar eclipse 2009
tom6740: Lunar eclipse, 2014 Oct 8, 6:38 EDT
tom6740: Partial solar eclipse, 2014 Oct 23
tom6740: Stargazer
tom6740: Lunar eclipse 2015-09-28
tom6740: Total lunar eclipse 2015-09-28, close to 3rd contact
tom6740: Total lunar eclipse 2015-09-28
tom6740: Total lunar eclipse 2015-09-28
tom6740: Total lunar eclipse 2015-09-28, close to 3rd contact
tom6740: Clouds moving out during the total lunar eclipse 2015-09-28
tom6740: Lunar eclipse 2015-09-28
tom6740: Alan Stern's New Horizons Briefing, AAS/DPS 2015
tom6740: Sculture of Lunar Surface, Art Exhibition at AAS/DPS 2015
tom6740: Model of Enceladus at AAS/DPS 2015
tom6740: Model of New Horizons Spacecraft
tom6740: Summer Milky Way at Peaks of Otter
tom6740: Cronyn refractor
tom6740: Mercury transit, 2016 May 9
tom6740: Mercury transit, 2016 May 9