Using NASA's Hubble Space Telescope, astronomers have found an outburst from our galaxy's supermassive black hole once lit up the farthest reaches of the Milky Way like a "Christmas tree," an event our distant ancestors would have likely witnessed.
Using NASA's Hubble Space Telescope, astronomers have found an outburst from our galaxy's supermassive black hole once lit up the farthest reaches of the Milky Way like a "Christmas tree," an event our distant ancestors would have likely witnessed.