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Exobiology speculates that microscopic life originated elsewhere and was brought here by a meteorite sent off by some violent distaster, which while it has not been proven is very scientifically plausible, as germs and viruses have proven to be able to survive in outer space and there is a gigantic gash on mars (a planet with water likely to have once supported life) which could have sent such a meteorite into outer space. Also, since comets are thought to be made substantially of water ice, it is theorized that they are the primary source of earth's water. It may seem unlikely, but in the early stages of earth's development there were probably many, many more comets than there are today, and it is not impossible that enough comets could have collided with earth over millions of years to supply us with our water.
Wiki User
∙ 16y ago
Wiki User
∙ 11y agoits possible what made life on earth possible.
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How can comets and asteroids affect earth?
There is only one way that a comet or asteroid can affect the earth. These two things can affect the earth if they enter the earth's atmosphere and hit our planet.
Is it possible comets may have any influence in the earths' weather or cycles even the orbit variances?
Comets have a very low mass compared to Earth, so any affect they will have on Earth is from impacts which will affect the global weather.
Explain at least two ways that comets and asteroids can affect the Earth?
Comets can affect Earth in the future and have affected Earth a great deal in the past. Primordial Earth: Primordial Earth, particularly in the first billion years of Earth, was shaped greatly by comets and asteroids and meteorites. Based on the known populations of comets now and projections to that earlier time, there is substantial evidence that half or more of all water on Earth was brought by comets. Comet History: Comets were a pretty unexpected apparition in the night sky before anyone knew what they were. For thousands of years people have seen them an taken them to be some kind of omen. History records great events and decisions connected with comets. Starting around the 1600s when science and astronomy were becoming separate from astrology and magic, comets were a helpful and motivating factor in stimulating the study of the cosmos. They have been such ever since. We now know that comets are the source of meteor showers, an amazement to mankind throughout history. There are not many reliable examples of large comets striking the Earth in recent history, but we can be quite certain that is has happened. Comet Shoemaker-Levi was quite spectacular when it hit Jupiter in 1993, leaving a disturbance in Jupiter's atmosphere that was larger than the size of the Earth. Comet Future: Still a a stimulus for scientific study, comets give us an opportunity to sample material from the most distant parts of the solar system. In particular, the source of most comets is from either the Kuiper belt beyond Neptune or the far more distant Oort cloud. Comets are large enough to be dangerous. Comet nuclei range from about 100 meters to tens of kilometers across. They are not solid like asteroids but composed of rock, dust, water ice, and frozen gases. Still, a large comet impact on Earth could be catastrophic for life and probably has been in the distant past. Unlike asteroids, they are less likely to appear suddenly and the probabilities for such a disaster are much lower for comets than asteroids.
Which of these hit the earth comets or asteroids?
It is possible for comets and asteroids to hit Earth, but they are extremely rare events.
What do we see comets as?
From the earth we see comets as shooting stars, because theres a tail to it.
Explain at least two ways that comets and asteroids can affect earth?
it can destroy earth
How can comets and asteroids affect earth?
There is only one way that a comet or asteroid can affect the earth. These two things can affect the earth if they enter the earth's atmosphere and hit our planet.
Is it possible comets may have any influence in the earths' weather or cycles even the orbit variances?
Comets have a very low mass compared to Earth, so any affect they will have on Earth is from impacts which will affect the global weather.
Does comets go the earth?
earth the comets to go
How has comets helped the study of space?
Comets come from the coldest parts of the universe and contain ice and organic materials. Scientists believe that impacts from comets on earth are responsible for contributing to organic materials and possibly life on earth.
What was the first comet that hit earth?
Impossible to say. Comets have been striking the earth since before life evolved on the earth
Explain at least two ways that comets and asteroids can affect the Earth?
Comets can affect Earth in the future and have affected Earth a great deal in the past. Primordial Earth: Primordial Earth, particularly in the first billion years of Earth, was shaped greatly by comets and asteroids and meteorites. Based on the known populations of comets now and projections to that earlier time, there is substantial evidence that half or more of all water on Earth was brought by comets. Comet History: Comets were a pretty unexpected apparition in the night sky before anyone knew what they were. For thousands of years people have seen them an taken them to be some kind of omen. History records great events and decisions connected with comets. Starting around the 1600s when science and astronomy were becoming separate from astrology and magic, comets were a helpful and motivating factor in stimulating the study of the cosmos. They have been such ever since. We now know that comets are the source of meteor showers, an amazement to mankind throughout history. There are not many reliable examples of large comets striking the Earth in recent history, but we can be quite certain that is has happened. Comet Shoemaker-Levi was quite spectacular when it hit Jupiter in 1993, leaving a disturbance in Jupiter's atmosphere that was larger than the size of the Earth. Comet Future: Still a a stimulus for scientific study, comets give us an opportunity to sample material from the most distant parts of the solar system. In particular, the source of most comets is from either the Kuiper belt beyond Neptune or the far more distant Oort cloud. Comets are large enough to be dangerous. Comet nuclei range from about 100 meters to tens of kilometers across. They are not solid like asteroids but composed of rock, dust, water ice, and frozen gases. Still, a large comet impact on Earth could be catastrophic for life and probably has been in the distant past. Unlike asteroids, they are less likely to appear suddenly and the probabilities for such a disaster are much lower for comets than asteroids.
What things do humans believe comets brought to earth before life began?
Some scientists, notably Sir Fred Hoyle, believed that comets were a substantial source of water for the Earth. It's even possible that life itself came from space as microscopic spores or bacteria.
Which of these hit the earth comets or asteroids?
It is possible for comets and asteroids to hit Earth, but they are extremely rare events.
Is there ability to support life on comets?
No. Comets are too cold to support life.
How are comets different from earth?
Comets are different from us because this a %^@@%^&_+)( question
Where do comets get their names?
earth
