Kepler's Star (SN Oph 1604)
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Kepler's Supernova Remnant.
Image: Hubble Space Telescope
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A Type Ia supernova whose light reached Earth in 1604; the resulting "new" star, which reached a visual magnitude of about -2.2 in late October, was described by Johannes Kepler in his De Stella Nova (1606). The visible supernova remnant consists of a few faint filaments and knots in the galactic halo at a distance of 30,000 to 40,000 light-years, and 4,000 to 5,000 light-years above the galactic plane. Also known as Kepler's Supernova.
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