UNIVERSE
ASTEROIDS
|
Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
|
|
|
A comet that is over 200 years old
|
|
|
A comet with an orbit longer than 200 years
|
|
|
A comet that you can see for a long period of time
|
|
|
A comet with a tail longer that 200km
|
Detailed explanation-1: -There are two categories of comet, based on the amount of time they take to orbit the Sun. Short-period comets take less than 200 years, and long-period comets take over 200 years, with some taking 100, 000 to 1 million years to orbit the Sun.
Detailed explanation-2: -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).
Detailed explanation-3: -The letter “P” indicates that Halley is a “periodic” comet. Periodic comets have an orbital period of less than 200 years.
Detailed explanation-4: -As far as the longest period comets go, the current leaders are Comet Hyakutake with an orbital period of 70, 000 years, Comet C/2006 P1 with an orbital period of about 92, 000 years and Comet West with an orbital period of about 250, 000 years.