NASA previews Eta Carinae supernova

At the turn of the 19th century, the binary star system Eta Carinae appeared faint and rather undistinguished to astronomers.

Astronomers watch replay of celestial eruption

In the mid-nineteenth century, one of the most massive stars in our Milky Way galaxy suddenly got much brighter. For ten years, indeed, it was the second-brightest star in the sky.