Once considered the ninth planet in the solar system, Pluto

[BTGmoderatorDC]

Once considered the ninth planet in the solar system, Pluto was discovered in 1930, lost its planetary status in 2006, which prompted the International Astronomical Union (IAU) to create a new definition for the term 'planet', and is now categorized as just one out of 70,000 icy objects in the Kuiper Belt measuring 100 kilometers across or more.

A. Once considered the ninth planet in the solar system, Pluto was discovered in 1930, lost its planetary status in 2006, which prompted the International Astronomical Union (IAU) to create a new definition for the term 'planet', and is now categorized as just one out of 70,000 icy objects in the Kuiper Belt measuring

B. Discovered in 1930 and once considered the ninth planet in the solar system, Pluto lost its planetary status in 2006, a development that prompted the International Astronomical Union (IAU) to create a new definition for the term 'planet', and is now categorized as just one out of 70,000 icy objects in the Kuiper Belt that measure

C. Discovered in 1930, Pluto, once considered the ninth planet in the solar system, lost its planetary status in 2006, a development prompting the International Astronomical Union (IAU) to create a new definition for the term 'planet', now categorized as just one out of 70,000 icy objects in the Kuiper Belt to measure

D. Pluto, discovered in 1930 and once considered the ninth planet in the solar system, lost its planetary status in 2006, a development that prompted the International Astronomical Union (IAU) to create a new definition for the term 'planet', is now categorized as just one out of 70,000 icy objects in the Kuiper Belt to measure

E. Discovered in 1930 and once considered the ninth planet in the solar system, Pluto lost its planetary status in 2006, prompted the International Astronomical Union (IAU) to create a new definition for the term 'planet', and is now categorized as just one out of 70,000 icy objects in the Kuiper Belt that measure

OA B

Source: e-GMAT