ORB means Observatoire Royal de Belgique Royal Observatory of Belgium in Astronomy
Similar to ORB
AESS - Institute of Electrical and Electronic Engineers - Aerospace and Electronics Systems SocietyAET - Accuracy Enhancing Technology
AGN - Active Galaxy Nucleus
AH - Asteroid Hunt
ALAT - Airborne Large Aperture Telescope
ALFA - A Laser For Astronomy
ALIS - Airborne Laser Isotope Spectrometer
View all in Astronomy