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visits member for 2 years, 6 months
seen 6 hours ago

Apr
21
awarded  Revival
Apr
21
awarded  Teacher
Apr
21
awarded  Scholar
Apr
21
accepted Are cylindrical mirror telescopes possible?
Apr
21
answered Are cylindrical mirror telescopes possible?
Jun
10
awarded  Student
Jun
10
asked Are cylindrical mirror telescopes possible?
Apr
18
awarded  Supporter