The first planets around other Sun-like stars were discovered
A)by Huygens,following his realization that other stars are Suns.
B)by Galileo following the invention of the telescope.
C)at the turn of last century.
D)about a decade ago.
E)at the turn of this century.

Question

Quizplus · Accepted Answer

The first planets around other Sun-like stars were discovered about a decade ago, which refers to the late 1990s and early 2000s when the first exoplanets were detected using radial velocity and transit methods. Option A is incorrect as Huygens lived in the 17th century and did not possess the technology to observe exoplanets. Option B is incorrect because Galileo's telescopes were not powerful enough to detect exoplanets either. Option C is incorrect as the first exoplanet was not discovered until 1995, which is less than a century ago. Option E is incorrect because the turn of this century occurred after the first exoplanets were already discovered.

The First Planets Around Other Sun-Like Stars Were Discovered