NGC 6946
NGC 6946, also known as the Fireworks galaxy, Arp 29, and Caldwell 12, is a spiral galaxy in the constellation of Cepheus and Cygnus. It is about 22.5 million light-years away[2] from Earth. It was discovered by William Herschel in September 9, 1798. It's highly obscured by interestellar matter, and it's very close to the galactic plane. It has a third of the Milky Way’s size.
| Fireworks Galaxy | |
|---|---|
 | |
| Observation data (J2000[1] epoch) | |
| Right ascension | 20h 34m 52.3s [1] |
| Declination | 60° 09′ 14″ [1] |
| Redshift | 0.000160 |
| Distance | 22.5±7.8 Mly [2] |
| Type | SAB(rs)cd |
| Notable features | Galaxy with lots of Supernovae |
| Other designations | |
| UGC 11597, Arp 29, PGC 65001, SPB93 263, 8C 2033+599, 11HUGS 410, IRAS 20338+5958, IRASF 20338+5958 | |
Supernovae in NGC 6946
Fireworks Galaxy has this name because of how many supernovae happened in the galaxy.[3] The supernovae in this galaxy occur very frequently. In the last century a total of 9 supernovae were seen from this galaxy: SN 1917a, SN 1939c, SN 1948b, SNSN 1968d, SN 1969p, SN 1980k, SN 2002hh, SN 2004et, SN2008s.
NGC 6946 Media
This image from the Kitt Peak National Observatory contextualizes the locations of supernovae 2004et and 2017eaw within the galaxy.
Images of 2017eaw in NGC 6946, taken between May and November 2017, as the supernova was slowly fading
Pair of visible-light and near-infrared photos from the Hubble Space Telescope showing the giant star N6946-BH1 before and after it vanished out of sight by imploding to form a black hole
NASA/ESA/CSA James Webb Space Telescope image of NGC 6946, revealing large amounts of dust from the two supernovae SN 2004et and SN 2017eaw
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