COMET HALE-BOPP, COMET SWIFT-TUTTLE, COMET HYAKUTAKE, COMET HALLEY, and COMET SHOEMAKER-LEVY 9
Typically, several comets are spotted every year.
The most visible changes have been in the accuracy of the physics engines.
Long period comets originate in the Oort Cloud.
Although sometimes not visible from parts of the planet, comets can be seen from very large geographical areas on Earth, not only from individual locations.
Jupiter has a visible permanent hurricane called the Great Red Spot. It is a massive storm that has been observed on the planet for over 400 years.
they come from space DUHXX
Long period comets originate in the Oort Cloud.
They seem to be bits left over from the formation of the Solar System about 4.5 billion years ago.
Much about what we think we know about comets is, at best, educated guesswork. We have sampled the tails of three comets, and all were different. We observed an impact into the nucleus of one comet. We believe that comets have a source in the "Oort Cloud", but no instrument currently exists that is sensitive enough to detect the Oort Cloud - so we have NO EVIDENCE that the "Oort Cloud" exists. It makes "sense"; comets have to come from SOMEPLACE, since no comet could have survived 4.5 billion years of close passes by the Sun. But the fact is that what we know about comets is like a bucket, and what we do NOT know about comets is like an ocean. And over the next 300 years, I predict that we will discover that at least half of what we "know" about comets will turn out to have been wrong.
over 1500 coets have been seen over 200 years we wont see comet hale bop until year 4395! a comet is made from ice dust and rock! these are called dirty snowballs
Comets are composed of ice and dusty and are present in space. There are over 5 thousand different known comets.
Some comets that have appeared in the last 25 years are Hale-Bopp, Hyakutake, Shoemaker-Levy 9, Swift-Tuttle, and Tempel 1. C/2006 P1 McNaught was the brightest comet in the last 25 years.