In 1930 a young astronomer found a new planet in the solar system and it was named Pluto. Seventy-five years later, other astronomers determined that Pluto was not a planet after all, causing an uproar in the scientific community.
In 1930 a young astronomer found a new planet in the solar system and it was named Pluto. Seventy-five years later, other astronomers determined that Pluto was not a planet after all, causing an uproar in the scientific community.