No it didn't, it will return!
That is Halley's comet, named after English astronomer Edmond Halley,
Difficult to know. The comet which later came to bear Edmund Halley's name has probably been visible throughout human history. But not until Halley did most people accept that all those different comets were all different visits of the SAME comet
At the end of December 2011, the following comets are all brighter than magnitude 12 as seen from Earth: -- C/2009 P1 Garradd -- P/2011 Y1 Levy -- C/2011 W3 Lovejoy -- 21P Giacobini-Zinner
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".
By themselves, comets are not really important. Even the most impressive comet, like Hale-Bopp, is a visual spectacle only. But the POTENTIAL for a comet - to strike the Earth directly and cause untold devastation - is far more significant. Right now, if we were to see a comet aimed at the Earth, there is very little that we could do about it, other than stand there and die. The threat of a comet impact, like the ones that have devastated our planet several times before, ought to be enough spur us all into looking for ways to protect ourselves from the inevitable time that it WILL happen again.
The Bayeux Tapestry is one of the most famous in the word! it is a wonder that u all dont know it because i did, off the top of my head HAHAHAHAH
No, there is no comet coming near Earth in 2012. All of the 2012 stuff is just a hoax.
no they all died when a comet hit the earth.
Nothing much, recently. Halley's Comet is out beyond the orbit of Neptune. moving slowly through space near the peak of its path through the solar system. Because it is so far from the Sun, it is frozen solid, with not gaseous coma reflecting the sunlight. And because comet nuclei are fairly small, it is invisible in all except the largest telescopes.
Comets are dangerous because, they are pulled by gravity and when they hit the surface of a planet the force pushes it down and if you were in the way of the comet you would surely be dead. i hope that answered you question Ireland92109
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.
what land on the earth was covered by