WTTM means WIYN Wisconsin, Indiana University, Yale University, and NOAO National Optical Astronomy Observatories Observatory Tip-Tilt Module in Astronomy
Similar to WTTM
AEG - Astro Event GroupAESS - Institute of Electrical and Electronic Engineers - Aerospace and Electronics Systems Society
AET - Accuracy Enhancing Technology
AGN - Active Galaxy Nucleus
AH - Asteroid Hunt
ALAT - Airborne Large Aperture Telescope
ALFA - A Laser For Astronomy
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