give reasons why pluto has been downgraded from planet to planetoid.?

Answer 1

It has to due with composition and behavior. Pluto has the same composition as thousands of other similar objects past it.(ice and rock) It also has a moon, Charon, that is almost the same size. The gravitational pull on each other causes them to practically form a double planet, revolving around each other.Scientists think Pluto and Charon formed when Pluto collided with a similar sized planet and the debris recombined to form 2 separate bodies.

Answer 2

It is because of the discovery of another planetoid larger than pluto. Pluto is smaller in size compared to the earth's moon and can not be considered a planet.

Answer 3

Because pluto is smaller than one of its moons.
Because it does not have a regular orbit around the sun.
Because it drifts around too much - sometimes becoming the 8th plante fron the sun (due to orbiting).
Because there have been other objects found in sapce larger than pluto.
Because pluto doesn't have a comletely spherical shape.
it is not heavy enough to have a pull of gravity to make it into a round object.
Because if it were a planet, then the definition of planets would alow there to be more than dozens added due to new discoveries.

Answer 4

Other cosmic objects the same size as pluto have been identified. Either they all become planets, or Pluto becomes a planetoid.

Answer 5

could be that someone wanted to get famous at pluto"s expense

Answer 6

iT IS TOO SMALL AND IT IS IN A NOT WELL KNOWN RING OF ASTERIODS ORBITING THE SUN SO SCIENTISTS THINK IT MIGHT JUST BE A LARGE ASTERIOD

Answer 7

caz it was too far from our earth and relations lost their meaning being too far

Answer 8

I think it's because of it's size. (small)