The orbits of comets are ellipses that are greatly elongated or parabolas.
Comets also have their troubles, their perihilions, their hyperbolas and their parabolas.
If, in this approach, they are not disturbed by any of the large planets, they again recede in parabolas or hyperbolas.
The comets have orbits that are usually very elongated ellipses or parabolas.
Nearly three-fourths ...