What part of a comet has only been seen by a space probe?
A) meteoroid trail
B) dust tail
C) ion tail
D) coma
E) nucleus

Question

Quizplus · Accepted Answer

The nucleus of a comet, which is the solid and icy part at its center, has only been directly observed by space probes such as NASA's Stardust and ESA's Rosetta mission. Other parts of comets, such as the coma, ion tail, dust tail, and meteoroid trail, can be observed from Earth with telescopes.

What Part of a Comet Has Only Been Seen by a Space