WR 102ka also known as the Peony Nebula Star or Peony star is a Wolf-Rayet star that is one of several candidates for the most luminous known star in our Milky Way Galaxy. The nearer star Eta Carinae, which was the second brightest star in the sky for a few years in the 19th Century, appears to be slightly more luminous than WR 102ka, but it is known to be a binary star system. There is also the more recently discovered Pistol star which, like the Peony star, derives its name from the shape of the nebula it is embedded in and which has probably created through heavy mass loss via fierce stellar winds and perhaps also major "mini-supernova-like" eruptions as happened to Eta Carinae around the 1830s-1840s creating the lobes observed by the Hubble Space Telescope.
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