Final answer:
Most extrasolar planets have been found orbiting stars with masses and thus temperatures similar to or cooler than the Sun, expanding our understanding of the diversity of planetary systems and supporting the search for habitable worlds.
Step-by-step explanation:
The question regarding the temperatures of stars around which most of the extrasolar planets detected to date orbit can be answered through current astronomical findings. Based on these observations, the majority of discovered exoplanets are found to be orbiting stars with masses similar to the Sun, suggesting that these stars have temperatures that are either similar to or cooler than that of the Sun. Statistical analyses, including data corrected for selection biases, have revealed that exoplanets, ranging from small terrestrial planets to "super Earths", are commonly found around these types of stars.
Exoplanet discoveries have diversified our understanding of planet formation and the types of planetary systems that exist. While some exoplanets are found in conditions very different from our solar system, like the so-called "hot Jupiters," there is a significant number of planets discovered in orbits around stars that share characteristics with our Sun. These findings fuel the ongoing search for habitable planets and contribute to the anticipation that many such worlds might exist within our own Milky Way Galaxy.