In 1776, the solar system only had 6 planets. Now, it has 8. Does it end there?
Over the past 250 years, the number of “planets” in our solar system has ranged from six to nine — and, briefly, even 11 — depending on what astronomers knew…
Over the past 250 years, the number of “planets” in our solar system has ranged from six to nine — and, briefly, even 11 — depending on what astronomers knew…