权威例句
CZJ O16 versus TV Plossl 15 on faint galaxies
RADCAT, old spin-stabilized spacecraft
Oh that was easy! My corrector is clean again.
IRIDIUM FLARES
103P Hartley 2 ephemeris ???
CPC800, C8-SGT and Nexstar 8SE
Seeing the Galillean satallites naked eye
Baader solar film (photographic vs. visual)
3.7mm Ethos SX / Tak Sky 90 II
GOOD EYEPIECE FOR LOOKING AT SATURN AND JUPITER ?