In which of these ways is our solar system typical of exoplanet systems so far discovered?
A) The number of planets in our solar system is comparable to those of most exoplanet systems.
B) The age of our solar system is close to the average age of other planetary systems.
C) The number of gas giants in our solar system is comparable to those of most exoplanet systems.
D) Most exoplanets have nearly circular orbits, like those in our solar system.

Question

Quizplus · Accepted Answer

The age of our solar system, at about 4.6 billion years, is indeed close to the average age of other planetary systems that have been discovered. Many exoplanet systems observed are also several billion years old, indicating that our solar system's age is not unusual in the context of the galaxy.

In Which of These Ways Is Our Solar System Typical