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Globular cluster in the constellation Ophiuchus
NGC 6401 is a globular cluster in the constellation Ophiuchus. William Herschel discovered this star cluster in 1784 with his 47 cm telescope, but mistakenly believed it to be a bright nebula. Later his son, John Herschel, was to make the same error because the technology of the day was insufficient to allow the individual stars to be resolved visually.
External links
Media related to NGC 6401 at Wikimedia Commons
- NGC 6401 SEDS.org (Revised NGC)
- NGC 6401 NASA Extragalactic Database
- Enigmatic cluster targeted by Hubble
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