The bizarre frog-like object, dubbed Hanny’s Voorwerp (Hanny’s Object in Dutch, Dutch word of the day !), is the only visible part of a 300,000-light-year-long streamer of gas stretching around the galaxy, called IC 2497. It is named after Ms.Hanny van Arkel, the Dutch schoolteacher who discovered the ghostly structure in 2007 while participating in the online Galaxy Zoo project. Galaxy Zoo enlists the public to help classify more than a million galaxies catalogued in the Sloan Digital Sky Survey. This is a prime example of public outreach programs returning exciting objects.
Guest Post by D. Barat