Text 1: Astronomer Park argues that the discovery of thousands of exoplanets — planets orbiting other stars — has revolutionized our sense of the cosmos. Many of these worlds are roughly Earth-sized; some lie in their stars' habitable zones; the universe seems crowded with possibilities for life.
Text 2: Astronomer Singh accepts the abundance of exoplanets but cautions against equating "habitable zone" with "habitable." Many Earth-sized planets in the right orbital range orbit stars that blast their planets with stellar flares; tidal locking is common; atmospheres are often unknown. The cosmos may be crowded with planets, Singh argues, but not necessarily with friendly ones.
Both authors would most likely agree that
- A
exoplanet research has produced no useful findings.
- Bcheck_circle
many exoplanets, including Earth-sized ones, have been discovered.
- C
every exoplanet in a habitable zone is suitable for life.
- D
no exoplanets have ever been confirmed.
Explanation
Both accept the abundance of detected exoplanets, including Earth-sized ones. A is shared. B, C, and D contradict at least one author.