Probably several times. It is assumed that a third of Earth water came from comets and it was a comet that hit the Earth 65 million years ago and caused the dinosaur extinction.
As far as we know, no rogue planet has ever come near Earth. Comets and asteroids have come near Earth, but not actual planets.
as far as i am aware it is haley's comet
There is no record of a comet directly hitting Earth in recorded history. Comets are typically small icy bodies that mostly burn up upon entering the Earth's atmosphere due to friction with the air. However, they can cause spectacular meteor showers when their debris interacts with Earth's atmosphere.
Yes Halley's comet struck Arizona over 63 million years ago and is believed to have caused the extinction of dinosaurs.
200000000000000000000000000009 or something like that. We don't know for sure when or what time the comet will hit us but I'm sure that the news would warn us.The above answer is wrong because earth will be gone in about 7.5 Billion years due to the sun becoming a red giant and engalfing it and 7.5 million years is 75000000000. Comets hitting earth is very rare and hard to tell if one has ever hit earth but one is speculated to have hit earth 12,000 years ago but they hit earth much more rarely than meteors and asteroids. Most of them are either pushed away from the earths atmosphere or burn up in it. So I suspect it probably won't happen for a very long if one indeed did hit earth only 12, 000 years ago. I don't expect another one to hit earth for at least another 300, 000 years from now.
Halley's Comet
A Comet is a body in perpetual orbit. A Meteorite is a body which enters the Earth's atmosphere. It is unlikely that Halley's Comet will ever crash into the Earth.
As far as is known from written records in human history,no comet has ever circled the earth.
Halley's Comet is unlikely to ever pose a hazard to the Earth. As such, it has no ecological significance.
Theoretically it is possible, but the odds are realy against it.
No. It is over 55 million miles from Earth when it gets to its closest so there is no chance of it hitting us.
As far as we know, no rogue planet has ever come near Earth. Comets and asteroids have come near Earth, but not actual planets.
No. At its closest it is over 55 million miles from Earth, so it cannot harm anyone.
as far as i am aware it is haley's comet
Quite low. Debris shed from comets as they orbit the Sun strike the Earth thousands of times per year, but most of the debris, in the form of periodic meteor showers, is pretty tiny; an average sized particle would be the size of a grain of rice or smaller. But for the Earth to be struck by the nucleus of the comet itself? We're not certain that an actual comet has EVER struck the Earth, although we can be relatively confident that objects about the size of a comet has hit the Earth once every few thousand years or so. The probability of a comet striking the Earth within the next 50 years is quite low; one or two percent, but no higher.
g comet
Halley's Comet has been visible over the New Year, during several passes. Halley's Comet is generally visible for a few months during each pass. See the link for the known first-sighting dates.