In what way are many of the extrasolar planetary systems that have been discovered so far fundamentally different from our own solar system?
A) The relative positions of where the planets formed are inverted, with the Jovian-type planets forming close to the stars and the terrestrial-type planets forming farther out.
B) The terrestrial-mass planets are significantly outnumbered by the Jovian-mass planets.
C) The massive Jovian-type planets appear to have formed at large distances, like our own Jovian planets, and then spiraled in close to their stars.
D) There are no Jovian-mass planets.

Question

Quizplus · Accepted Answer

Many of the extrasolar planetary systems that have been discovered so far are fundamentally different from our own solar system because the terrestrial-mass planets are significantly outnumbered by the Jovian-mass planets. In our own solar system, there are four terrestrial planets and four Jovian planets, but in many of the extrasolar planetary systems, Jovian-mass planets are much more common. Additionally, many of these Jovian planets are much closer to their stars than Jupiter is to the Sun, indicating different formation and migration histories.

In What Way Are Many of the Extrasolar Planetary Systems