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Rankings use category fit, feature coverage, pricing signals, public reception, and recency. Affiliate relationships do not affect scores.

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Best 1 National Astronomical Observatory of Japan

The National Astronomical Observatory of Japan (NAOJ) conducts astronomical research utilizing both optical and radio telescopes. Located in Japan, it operates a network of ground-based observatories including the Subaru Telescope and the Very Large Array Radio Telescope. NAOJ supports scientists st...

2 Subaru Telescope

The Subaru Telescope is an 8.2-meter optical-infrared facility situated on the summit of Maunakea in Hawaii. Inaugurated in 1999, it is operated by the National Astronomical Observatory of Japan (NAOJ) and utilizes a prime focus design with active optics to capture wide-field images of the night sky...

3 Nobeyama Radio Observatory

The Nobeyama Radio Observatory is a radio astronomy facility operated by the National Astronomical Observatory of Japan (NAOJ), located in Nagano Prefecture. Its primary instrument is the Nobeyama 45-meter radio telescope, completed in 1982, which was one of the largest millimeter-wave telescopes in...

4 Okayama Astrophysical Observatory

The Okayama Astrophysical Observatory is a Japanese optical observatory in Asakuchi, Okayama Prefecture, operated by the National Astronomical Observatory of Japan. Established in 1960, it is associated with the 188-centimeter telescope, which has been used for optical and infrared observations, inc...

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