WAtacama B-Mode Search
WAtacama Cosmology Telescope
WAtacama Large Millimeter Array
WAtacama Submillimeter Telescope Experiment
WCerro Armazones Observatory
WCerro Chajnantor Atacama Telescope
WNational Astronomical Observatory (Chile)
WCerro Pachón
WCerro Tololo Inter-American Observatory
WCosmic Background Imager
WEuropean Southern Observatory
WEvryscope
WExtremely Large Telescope
WGemini Observatory
WGiant Magellan Telescope
WLa Silla Observatory
WLas Campanas Observatory
WLlano de Chajnantor Observatory
WNational Astronomical Observatory (Chile)
WNANTEN2 Observatory
WNational Astronomical Observatory (Chile)
WNational Optical Astronomy Observatory
WNOIRLab
WOverwhelmingly Large Telescope
WParanal Observatory
WPIONIER (VLTI)
WQUIET
WSimons Observatory
WSouthern Astrophysical Research Telescope
WTRAPPIST
WUniversity of Tokyo Atacama Observatory
WVera C. Rubin Observatory
WVery Large Telescope
WVíctor M. Blanco Telescope
WVISTA (telescope)
WVLT Survey Telescope