QN: Why is PLUTO not a planet?
Answer:
for
a body to become a planet it must meet the following criteria
1. It
must orbit around a star
2. It must be massive enough si that it's own
gravity causes it to assume a spherical shape
3. It must clear the
background neighborhood around its orbit
Because Pluto resides in
an Area of space populated by numerous other objects, it is no longer
considered a planet. It has failed to meet the third characteristic that is it's neighborhood around it's orbit is not cleared and it is now termed as a dwarf planet
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