Kepler's Star (SN Oph 1604)
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.
| Kepler's Supernova Remnant.
Image: Hubble Space Telescope