Question

b)suppose only 1 in every 1,000 stars in the observable universe has a planetary system. how many planetary systems are there?

Answer 1

Explanation:

Our solar system is just one specific planetary system—a star with planets orbiting around it. Our planetary system is the only one officially called “solar system,” but astronomers have discovered more than 3,200 other stars with planets orbiting them in our galaxy. That's just how many we've found so far.