Name these bodies in space, often seen as bad omens by early people, whose tails point away from the sun.
In 2014, the European Rosetta probe will orbit one such object and place a lander on it. The theo- retical Oort Cloud is thought to be composed of these objects, and Aristotle referred to them as "stars with hair". Though they are actually very dark bodies, they give off a great deal of light at and near perihelion as a result of the ejection of dust and gas due to heating from the sun. Name these bodies in space, often seen as bad omens by early people, whose tails point away from the sun.
In 2014, the European Rosetta probe will orbit one such object and place a lander on it.
comets