Sometimes, when comets pass into the Earth’s atmosphere, their bright, fiery tails make them an easy mark for UFO enthusiasts. Some even take it a step farther, alleging that comets are merely the ultimate cloaking device of a spaceship. The 1997 mass suicide by the Heaven’s Gate group was orchestrated by followers who believed they were leaving Earth to meet a mother ship trailing behind the Hale-Bopp comet. Others have speculated that the Comet McNaught may be masking a mother ship or two in its tail. Here we see the comet photographed from Earth as it swept over New Mexico on June 13, 2010.