That prospect turned me into a serious shopper for trip cancellation and interruption insurance (one policy usually covers both), a product I had always dismissed as a rip-off. Like other value-oriented consumers, I had seen no need to add several hundred dollarsâ worth of vacation insurance to the price of a vacation. Until that trip. Since then we have insured a couple of other trips, but never needed to make a claim. The only time we came close was in the wake of 9/11.
Comet Facts. Comets, like asteroids, are small celestial bodies that orbit the Sun. However, unlike asteroids, comets are composed primarily of frozen ammonia, methane or water, and contain only small amounts of rocky material. As a result of this composition comets have been given the nickname of dirty snowballs..
Comets only have a tail and coma when they are close enough to the sun to heat... The U.S. National Aeronautics and Space Administration describes comets as consisting of a nucleus, coma and tail. Comets only have a tail and coma when they are close enough to the sun to heat... The U.S. National Aeronautics and Space Administration describes comets as consisting of a nucleus, coma and tail. Comets only have a tail and coma when they are close enough to the sun to heat up. NASA explains that the nucleus of a comet consists of ice, dirt, dust and other solid particles. When comets are far from the sun, they are dark and cold, with only a nucleus. The coma is a cloud of dust, gas and vapor that forms as the nucleus is heated.