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Where do long Comet cycling over 200 years come from?
Long period comets originate in the Oort Cloud.
Where do short and long period comets come from?
Short period comets are thought to originate in the Kuiper Belt, outside the orbit of Neptune.Long period comets originate in the Oort Cloud, which is far more distant, about half way to the nearest star!Comets, as with any astronomical body, can have its orbit perturbed (changed) by external gravitational forces. Long period comets can become short period and vice versa. The orbits can range from a few tens of years to many thousands, some can even escape altogether.
How are comets different?
-- Despite where they come from, some comets have different mass qualities. While some are long-term comets, some are short-term. Short-term period comets originate in the Kuiper belt or it's "shattered disc", which is around the orbit of Neptune. Long-term period comets originate in Oort cloud, which is a cloud of icy bodies in space.
Where do astronomers think that comets orignate?
Comets are classified by the size of their orbits. As soon as a comet is discovered, astronomers make measurements of its position to try to settle what orbit the comet is in. Many comets with an orbital period up to 100 years are in elongated elliptical orbits that extend out to Neptune's orbit and beyond. The faster comets with longer period might come from the Oort cloud at distances up to 1 light year or even further. A small class of comets come from outside the solar system and these are noted by their high speed and hyperbolic orbits which show they will make one visit and disappear off again.
In what region are most comets at?
We generally believe that comets with orbits of 200 years or less, traveling in the ecliptic plane, come from the Kuiper Belt. Those comets with longer orbits, or that travel at angles to the ecliptic plane, come from the Oort Cloud.
How often do comets from the oort cloud come to earth?
every 5-10 years.
Are comets from other galaxies?
No, they are not. They come from regions of asteroids that exist within our own solar system. Long period comets, the ones that appear once in thousands of years, probably come from the Oort Cloud, a spherical cloud of small icy asteroids believed to exist at the farthest outer reaches of the solar system. Short period comets like Halley's probably come from the Kuiper Belt, a ring of asteroids just beyone Neptune's orbit. The minor planet Pluto is the most famous Kuiper object. Not all objects in the Oort Cloud and Kuiper Belt are comets; in fact most are not.
What ia the zone from which a long period comet comes from?
By definition, long period comets come from within the gravitational pull of this solar system; when they leave the solar system, they are no longer considered to have a period.
How were comets found?
Comets come from the Oort cloud and the Kupier Belt
Is halleys comet long period or short period comet?
That depends on what you call 'long' or 'short'. Halley's period is in the neighborhood of 75 years, give or take a few years. Since that's short enough for two perihelions to occur within a single human lifetime, I guess it ought to be considered a short period.
Why do certain comets return at regular intervals?
All comets (there are over 3,500 known) have different time-scales for their appearances. These depend on the length of their orbits - some comets have extremely large orbits which take them from being 'close' to the earth to almost going out of our solar system. They appear because they come close enough to the Earth to be seen, and then they may take anything from a few years to hundreds of thousands of years beore they come back. The best-known comet is Halley's Comet which has a period of between 75 and 76 years between appearances.
How often does the comet Panstarr come within view?
That's a nonperiodic comet, meaning it won't come back any time soon. It is hard to determine the exact period of such comets.
