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This is Scientific American's 60-second science. I'm Christopher in Taliatta.

On March 11th, 1437, Korean royal astronomers noticed something out of the ordinary in the night sky.

There was a brand new star they had never seen before that was between two of the well-known stars in the tale of Scorpius.

That star was only seen for 14 days, and then it disappeared

and was never seen again. Michael Scherer, an astronomer at the American Museum of Natural

History in New York. He's spent more than two decades puzzling over this star that winked

at astronomers nearly 600 years ago.

You know, it's a mini-sided jigsaw puzzle, and I won't say we filled in all the pieces,

but at least I think we've got the corners and then the boundaries pretty much in place now.

What he and his colleagues have determined is this.

The disappearing star the Korean astronomers spotted, it was in fact a massive explosion produced by a

special type of binary star system known as a cataclysmic variable. That system consists of two stars.

One's a white dwarf. So it's the corpse of something that used to be a star in the distant past.

It's what's left after the star died. And its companion is a hydrogen

rich star, pretty much like our sun. And the white dwarf's gravity is so powerful that it can suck

hydrogen off of that companion. So in essence, it's cannibalizing its companion hydrogen rich star.

That hydrogen flows into a ring around the white dwarf,

...