The two other ELANS previously discovered are nicknamed the Slug Nebula (for UC Santa Cruz's idiosyncratic mascot) and the Jackpot Nebula (because it contains a whopping four quasars, extremely bright objects created by particles accelerating away from black holes). But the new ELAN is a head-scratcher. The Slug and the Jackpot have bright quasars illuminating their dust and gases, but the light source inside the newfound ELAN is a mystery. [Photos: The 12 Strangest Places on Earth]
"What's really odd here, and one of the hooks of the story, is there's nothing," said Jason X Prochaska, a professor of astronomy and astrophysics at UC Santa Cruz and one of the authors of the paper reporting the new nebula, available on the physics preprint website ArXiv. "There's the faint smudge of a galaxy, probably, but no quasar shining toward us.