yes.
it is the time when the tail is facing the north of the other comets like this <halleys tail is north of the other comets when they go > this way
Because comets cannot decide when they will be visible. It was a natural phenomena and remains so. Comets have a 'year' as do all solar objects. Halleys comets year happened to coincide with the battle. It was a coincidence, nothing more than that.
Comets and comet composition
1 - Halley's 2 - Lovejoy 3 - Hale-Bopp 4 - Ison 5 - Shoemaker-Levy 9 Note: Obviously that's a matter of opinion to some extent. I would have a different list. See "related link" below for a list of some famous comets. Note: Unfortunately, the photo and caption for the "eclipse comet of 1948" is wrong in this link.
yes.
it is the time when the tail is facing the north of the other comets like this <halleys tail is north of the other comets when they go > this way
Comets are made mostly of ice.
Because comets cannot decide when they will be visible. It was a natural phenomena and remains so. Comets have a 'year' as do all solar objects. Halleys comets year happened to coincide with the battle. It was a coincidence, nothing more than that.
Comets and comet composition
1 - Halley's 2 - Lovejoy 3 - Hale-Bopp 4 - Ison 5 - Shoemaker-Levy 9 Note: Obviously that's a matter of opinion to some extent. I would have a different list. See "related link" below for a list of some famous comets. Note: Unfortunately, the photo and caption for the "eclipse comet of 1948" is wrong in this link.
Halleys Comet is by far the best known. The second is harder to determine - Hale-Bopp and Comet McNaught are known at the moment amongst the general public.
All comets, we believe, are composed of a lot of ices such as frozen carbon dioxide, nitrogen, oxygen, water, and other gasses, with a lot of dust and some rocks. Science fiction writers Jerry Pournelle and Larry Niven described a comet as a "dirty snowball".
One thing that makes comets unique is that they each have a different chemical composition. Another thing is, each comet has its own distinct orbit around a particular star.
In the sense that an observer can see tails on comets - no, the gravity and composition of Mars is not favorable to the production of a tail.
big
Halley's comet is unique is that it takes 76 years to be visible from the earth on like other comets that can be seen annually