Why does Pluto have mountains?

 

The reasons are mean, the place where pluto lives has its own rules, it is very cold here, water ice becomes bedrock.

It gets frozen harder and meaner than stone on Earth. It is a place of giants mountains, jagged blocks of this water ice-They are not pushed up by colliding continents.

Frozen nitrogen, a great flat sea of it.

A glacier. A thing called Sputnik Planiti. A moving sheet of softer ice-puts great heft on the edges of its basin.

It shoves against the water ice crust-A thing that is unyielding, cracks and pushes colossal blocks miles into cold air.

There are other peaks.

Great mean mounds on the plains, these things are likely cryovolcanoes-They spew a slushy, icy mix from gut of Pluto, no hot lava.

Why is Pluto no longer considered a planet?

 The reason that Pluto is no longer a planet is not because of its size. In fact, it passes the test for "size" (mass).

The definition of 'planet' was made more strict. It is as following:

1. Massive enough to be round. Very massive bodies have so much gravity that they crush down any irregular edges towards their centre, and so become ball-like.

2. The primary object orbiting the Sun. For instance, the Moon orbit's the Sun, but it does so by orbiting the Earth. The Earth is the primary object orbiting the Sun.

3. Has cleared it's own orbit. Planets clear their orbits of debris/asteroids (by attracting them with their gravity).

Pluto passes 1 and 2, but has not passed 3. It has not cleared it's orbit of debris.

Objects like Pluto are called Dwarf Planets.

Why is Pluto no longer considered a planet?

 The reason that Pluto is no longer a planet is not because of its size. In fact, it passes the test for "size" (mass).

The definition of 'planet' was made more strict. It is as following:

1. Massive enough to be round. Very massive bodies have so much gravity that they crush down any irregular edges towards their centre, and so become ball-like.

2. The primary object orbiting the Sun. For instance, the Moon orbit's the Sun, but it does so by orbiting the Earth. The Earth is the primary object orbiting the Sun.

3. Has cleared it's own orbit. Planets clear their orbits of debris/asteroids (by attracting them with their gravity).

Pluto passes 1 and 2, but has not passed 3. It has not cleared it's orbit of debris.

Objects like Pluto are called Dwarf Planets.