The Two Tails of 67/P

I recently wrote about what we've learned from the space probe Rosetta as it's orbited the comet 67/P Churyumov-Gerasimenko: its structure, composition, size, mass, and more. And while the up-close-and-personal view is amazing, that's not to say we can't do some stuff from back on good ol' Earth, too. The image above shows the comet on Jan. 19. It was taken with the 2.5 meter Isaac Newton telescope on the Canary island of La Palma. The image is pretty deep, showing quite faint structures. Most o...