Why Pluto Is No Longer a Planet - Dwarf Planets Explained

The International Astronomical Union (IAU) downgraded the status of Pluto to that of a dwarf planet because it did not meet the three criteria the IAU uses to define a full-sized planet.

In 1972, *the Pioneer 10* space probe left Earth on a historic mission. This spacecraft was the first artificial object to achieve the escape velocity needed to leave the solar system. Scientists attached a gold-anodized plaque to the Pioneer 10, hoping that this craft would be intercepted by intelligent extraterrestrial

To continue reading "Why Pluto Is No Longer a Planet - Dwarf Planets Explained", login now.

This page has been protected for subscriber only.

Report an Error