ORB means Observatoire Royal de Belgique
Royal Observatory of Belgium in
Astronomy
Similar to ORB
ASWG - Astronomical Science Working Group
ASWG - ATST
Advanced Technology Solar Telescope Science Working Group
ATM - Apollo Telescope Mount
ATM - Amateur Telescope Maker
ATM - Amateur Telescope Making
AU - Alternate Universe
AU - Astronomical Unit
View all in Astronomy