Question

My homework today is. Is Pluto really a planet?

I always thought it was, can you help me please?

Answer 1

Pluto was considered a planet until a year or so ago. But scientists revised their definition of planet, and decided that Pluto wasn't really a planet, but a dwarf planet. Check this article.

http://news.nationalgeographic.com/news/2006/08/060824-pluto-planet.html

Answer 2

I learned in school that Pluto was the 9th of 9 planets in our system. However, Pluto has been downgraded. Here is a site that explains more about that downgrade in detail. http://en.wikipedia.org/wiki/Pluto