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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.

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14y ago
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14y ago

Somewhere within the orbit of Mars and Jupiter solar radiation becomes strong enough for the comet to vent gas. Comets are comprised largely of frozen carbon dioxide (CO2) which sublimates directly to gas, and water ice (H2O) which also steams off in the sunlight. This is what creates the comet's coma and tail. The tail is formed by the solar wind blowing bits of comet out away from the sun.

Long period comets make far fewer close passes towards the sun, so material is ablated over much less frequently.

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14y ago

Long period comets take a long time to come back around, while short-period comets only take a short time. Where's the cutoff? About 200 years. So a comet like Hale-Bopp, that won't come back into the inner solar system for another 2500 years, is a long period comet, while Halley's Comet (every 76 years) is a short-period comet.

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7y ago

Well this is my answer, because there is always a difference between long and short.

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12y ago

Long term comet

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Q: Is halleys comet long period or short period comet?
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comet shoemaker is aredy gone, it does not have a period.


Why does the short period comet revolves around the sun in more than 200 years while the long period comet revolves around the sun for thousands of millions?

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