The so-called “heart of Pluto” was first discovered in 2015, when NASA’s New Horizons space probe beamed back the first close-up images of the distant, demoted dwarf planet.

Is Pluto included in solar system models? A. That is a tricky question, as it depends on when the model was made. For example, Pluto was originally included as a proper planet in the solar system.

A solar system model is the most effective way to do this, and it is also a neat learning method. The 4M DIY Solar System Planetarium is an excellent choice, as it glows in the dark.

Though Pluto has formally been considered a dwarf planet for almost two decades, it still has many lessons left for planetary scientists — including hints about how the solar system formed.

Is Pluto included in solar system models? A. That is a tricky question, as it depends on when the model was made. For example, Pluto was originally included as a proper planet in the solar system.