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The Homunculus was ejected in an enormous outburst from Eta Carinae. Light from this event reached Earth in 1841, when Eta Carinae briefly became the second-brightest star in the sky, after Sirius; the ejected gas and dust have since obscured much of its light. The near-supernova explosion produced two polar lobes, and a large but thin equatorial disk, all moving outward at up to .