Question

what are periodical comets​

Answer 1

Explanation:

Periodic comets (also known as short-periodcomets) are comets with orbital periods of less than 200 years or that have been observed during more than a single perihelion passage (e.g. 153P/Ikeya–Zhang). "Periodic comet" is also sometimes used to mean anycomet with a periodic orbit, even if greater than 200 years.

Answer 2

Answer:

Periodic comets (also known as short-period comets) are comets with orbital periods of less than 200 years or that have been observed during more than a single perihelion passage (e.g. 153P/Ikeya–Zhang). "Periodic comet" is also sometimes used to mean any comet with a periodic orbit, even if greater than 200 years.

Explanation:

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