WONDER #1830: Where Is the Oort Cloud?

Question 1 of 3

Scientists theorized the existence of the Oort Cloud based upon their observation of what?

  1. bees
  2. astronauts
  3. comets
  4. planets

Question 2 of 3

Long-period comets have orbits that last over how many years?

  1. 10
  2. 50
  3. 200
  4. 1,000

Question 3 of 3

The Voyager 1 space probe exiting the solar system will not reach the Oort Cloud for how many more years?

  1. 30
  2. 300
  3. 100
  4. 47

Check your answers online at https://wonderopolis.org/wonder/where-is-the-oort-cloud.