Deciphering Eta Carinae’s eruptive twin
Image source [1]
![[1]](https://cdn.eso.org/images/wallpaper3/etamosaicnm2.jpg){kind=link}
ESA's XMM-Newton has spotted surprising changes in the powerful streams of gas from two massive stars in the binary star system HD 5980. One of the two stars had a major outburst reminiscent of the 19th-century eruption of Eta Carinae, and astronomers expected that its X-ray emission would fade gently over the years.
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