Question

Was Pluto downgraded from planet to ‘dwarf planet’ before or after the Mars Exploration Rover mission began?

Answer 1

The Mars Exploration Rover Mission while Pluto was removed as the planet in 2006

Explanation:

• It has all the characteristics of a planet but it was removed due to one reason
• It has not cleared its neighboring region of other objects.
• It was called the dwarf planet in the beginning but later on, it was removed completely from the solar  system