contestada

Based on discoveries to date, which of the following conclusions is justified?

a) Most stars have one or more terrestrial planets orbiting within their habitable zones.
b) Planets are common, but planets as small as Earth are extremely rare.
c) Planetary systems are common and planets similar in size to Earth are also common.
d) Although planetary systems are common, few resemble ours with terrestrial planets near the Sun and jovian planets far from the Sun.

Respuesta :

Most stars have one or more terrestrial planets orbiting within their habitable zones is the correct answer.  

Explanation:                    

According to the science, the  habitable zones  are the region around the stars where one or more terrestrial planets can orbit. A terrestrial planet orbits inhabitable zone is called potentially habitable zone which have  roughly comparable conditions to those of earth.

This situation is a proof stating that most of the stars have one or more terrestrial planets orbiting within their habitable zone.