SNY means Starry Night Backyard in Astronomy

Similar to SNY

AAAD - Amateur Astronomers Association of Delhi
AAAM - Active Amateur Astronomers of Maryland
AAS - American Astronautical Society
AAS - Archaeology, Astronautics, and Seti
AAT - Anglo Australian Telescope
AAVSO - American Association of Variable Star Observers
ABB - After the Big Bang

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