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» Porter (lunar crater)
Porter (lunar crater)
Glossary of Lunar Terminology
The Springfield Telescope Makers &
Guide to Observing the Moon
LUNAR SECTION CIRCULAR Vol
Tycho, at the Center of the Moon's Brightest and Most Extensive
Desert Sky Observer
MARCH 2019 EUCTEMON & Dark Ring
Telescopes (And Eyepieces)
Top View
