Final answer:
Each comet in the Oort cloud is approximately as far from its closest neighbor as the distance from Earth to Neptune.
Step-by-step explanation:
When comparing the distances between comets in the Oort cloud, each comet is approximately as far from its nearest neighbor as the distance from the Earth to Neptune. To understand this, we can consider that Neptune orbits the sun at a distance 30 times farther than Earth, and the average distances of Oort cloud comets are incredibly vast, ranging from about 2,000 to 100,000 times the Earth-Sun distance. Thus, the spacing between individual comets in the Oort cloud is loosely comparable to the scale of the solar system distances between planets, such as the distance from Earth to Neptune.