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The Earth has been hit by rocks from space many times. We are certain of a fair number of impact craters around the world, but which ones were meteors and which were comets? And does it really make a difference?
There have been a number of planetary extinction events, things that killed 75% or more of all life on Earth. Until 30 years ago, no one believed that a large meteor, asteroid or comet could have caused them. Then Luis Alvarez made a persuasive case that an impact near the Yucatan peninsula in Mexico had caused such global devastation 65 million years ago that it killed off, among others, the dinosaurs.
252 million years ago, a similar but bigger impact at the end of the Permian era probably killed off 95% of all life on earth.
And just this week (January 2, 2009), scientists have announced that an impact in northern Canada 12,900 years ago may have killed off the mammoths, mastodons, and saber-tooth tigers - and all the humans in North America - by melting a Canadian glacier and flooding the Mississippi River with icy water that then disrupted the Gulf Stream and caused the "Younger Dryas" mini-ice age. Beyond those, there is the Meteor Crater in Arizona, impact craters in France, and countless more. Install Google Earth, and start looking for circular hills; you'll find impact craters all over.
What else can I help you with?
Did a spacecraft ever visited an asteroid or a comet?
Yes, spacecrafts have visited both asteroids and comets. Some notable missions include NASA's OSIRIS-REx which visited the asteroid Bennu and JAXA's Hayabusa2 mission which visited the asteroid Ryugu. Additionally, the European Space Agency's Rosetta mission visited and landed on the comet 67P/Churyumov–Gerasimenko.
Has a comet ever come into contact with earth?
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.
Has earth ever had a near miss with an asteroid?
Yes. We have had several on record and probably many more that were not recorded.
What comet has longest tail ever recorded?
as far as i am aware it is haley's comet
Has a Comet Ever Hit?
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.
What is the distance of a meteoroid?
A meteoroid is a rock that is out in space. It can be any distance from the earth. Most of the meteoroids in the solar system are in the asteroid belt, between the orbit of Mars and the orbit of Jupiter. The closest meteoroids in the asteroid belt are about 100 million kilometers (62 million miles) from the earth. The farthest meteoroids in the asteroid belt are about 800 million kilometers (500 million miles) from the earth. The strong gravity of Jupiter can move some of these meteoroids out of their orbits and send them closer to the earth, so a few meteoroids run into the earth's atmosphere every day. Most meteoroids burn up in the earth's atmosphere before getting to the ground, so they hardly ever do any damage.
Will a asteroid ever hit the earth?
yes! it depend to gravitational pull and the weight of an asteroid
Where is Halley's comet going to crash?
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.
Will earth ever get hit by an asteroid again?
Almost certainly.
When was the Second to last time a comet circled the earth?
As far as is known from written records in human history,no comet has ever circled the earth.
What is ecological importance of Halley's Comet?
Halley's Comet is unlikely to ever pose a hazard to the Earth. As such, it has no ecological significance.
Will a comet ever strike Earth?
Theoretically it is possible, but the odds are realy against it.
Did a spacecraft ever visited an asteroid or a comet?
Yes, spacecrafts have visited both asteroids and comets. Some notable missions include NASA's OSIRIS-REx which visited the asteroid Bennu and JAXA's Hayabusa2 mission which visited the asteroid Ryugu. Additionally, the European Space Agency's Rosetta mission visited and landed on the comet 67P/Churyumov–Gerasimenko.
Has a comet ever come into contact with earth?
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.
What is the period of revolving around the sun of a meteoroid?
How long does it take a meteoroid to rotate around the sun? Is this what you mean to ask? This is a hard question because if you notice, there is an asteroid belt orbiting around the Sun between Mars and Jupiter. Saturn's rings are made of of frozen gases. There is another asteroid belt on the outer part of our Solar System and Pluto was thought to be a Planet ended up to be a very large addition to this belt. Meteors rotate around the sun at different times. Meteoroids are what they are called before they reach the Earth's Atmosphere. Then they are called meteorites when they hit the atmosphere of Earth. Have you ever heard of Meteor Crater? meteoroid is interplanetary debris. before they enter a planet's atmosphere meteorite is interplanetary debris after it or they enter the atmosphere. These meteorites can be so big that they can hit the Earth. We have meteorites burn up in our atmosphere daily and they are also known as a "falling star" MGills Thank you for the spell check, who ever you are.
Has earth ever had a near miss with an asteroid?
Yes. We have had several on record and probably many more that were not recorded.
Will Halley's comet ever crash to earth?
No. It is over 55 million miles from Earth when it gets to its closest so there is no chance of it hitting us.
