Astronomy Abbreviations and Acronyms

1. ORA
   FDA's Office of Regulatory Affairs
2. ORAS
   Oil Region Astrohomical Society
3. ORB
   Orbital Sciences Corporation
4. ORB
   Observatoire Royal de Belgique (Royal Observatory of Belgium)
5. ORBCOMM
   Orbital Communication
6. ORBI
   Stocknticker Symbol for Osc
7. ORBI
   Stock Ticker Symbol for Osc
8. ORBISCAL
   Orbiting Radio Beacon Ionospheric Satellite Calibration
9. ORCHIS
   System
10. ORD
    Operations Requirements Document
11. ORESAT
    Oregon Satellite
12. ORFEUS
    Orbiting and Retrievable Far and Extreme Ultraviolet Spectrometer
13. ORFEUS-SPAS
    Orbiting & Retrievable Far & Extreme Uv Spectrometer - Shuttle Palette Satellite
14. ORG
    Origin
15. ORI
    Orbit Replaceable Instrument
16. ORIG
    Origin
17. ORIGAMISAT 1
    Organization of Research Group On Advanced Deployable Membrane Structures for Innovativf Space Science Satellite
18. ORR
    Orbit Readiness Review
19. ORROE
    Occasional Reports of The Royal Observatory Edinburgh
20. ORROE
    Occasional Reports of the Royal Observatory, Edinburgh

Last updated: August 3, 2021 — Total entries: 5,938