What Is the Current Status of Our Search for Inhabitable,Earthlike

question 43

Multiple Choice

What is the current status of our search for inhabitable,Earthlike planets circling other stars?

• A) Two stars have now been discovered with an Earth-mass planet orbiting at distances suitable for liquid water and life,but we cannot yet determine whether they have oxygen-rich atmospheres.
• B) Planets have been detected orbiting other stars,but none appear to be suitable for life.
• C) No extrasolar planets of any kind have yet been confirmed.
• D) Several planets have been found with a mass similar to that of Earth,but they are either too close to or too far away from their star to have liquid water or life on their surfaces.