The age of the oldest extrasolar planet is estimated to be about:
A) half a million years.
B) 4.5 billion years, similar to Earth's age.
C) only a few thousand years.
D) 13 billion years.

Question

Quizplus · Accepted Answer

The oldest known extrasolar planet, PSR B1620-26 b, is estimated to be around 13 billion years old, making it one of the oldest known planets in the universe.

The Age of the Oldest Extrasolar Planet Is Estimated to Be