Here’s what really happened to Hanny’s Voorwerp
Astronomers can finally explain a gas cloud’s strange glow
![Hanny’s Voorwerp](https://i0.wp.com/www.sciencenews.org/wp-content/uploads/2017/11/112117_LG_manny-voorwerp_main.jpg?fit=860%2C460&ssl=1)
GLOWING GAS Hanny’s Voorwerp, the greenish smudge at the left of this image, is glowing thanks to photons from a feasting black hole in the galaxy at right.
NASA, ESA, W. Keel (Univ. Alabama), et al., Galaxy Zoo Team