Take a Gander at an Ancient Supernova in the Heart of the Milky Way: The remnants of a star that exploded 1,700 years ago

The dead star erupted around 1,700 years ago. It ejected material at around 2 million miles per hour.

Take a Gander at an Ancient Supernova in the Heart of the Milky Way: The remnants of a star that exploded 1,700 years ago