Which discovery about exoplanetary systems was most surprising considering how our own solar system formed?
A) Some exoplanetary systems contain planets within their habitable zones.
B) Some exoplanetary systems contain planets with a wide range of densities.
C) Some exoplanetary systems contain more than one Earth-sized planets.
D) Some exoplanetary systems contain Jupiter-sized planets that orbit close to their stars.

Question

Quizplus · Accepted Answer

The discovery of Jupiter-sized planets orbiting very close to their stars (hot Jupiters) was surprising because it challenged our understanding of planetary system formation, which did not predict such massive planets could form so close to their stars.

Which Discovery About Exoplanetary Systems Was Most Surprising Considering How