PLANETS!!! :) !!!

Q: Do you remember the planets of our Solar System?
A: Mercury- Venus- Earth- Mars- Jupiter- Saturn- Uranus- Neptune- ...

Debate: Is Pluto a dwarf planet or should it be restored to its original planetary status?
Maybe the NEW HORIZONS will reveal the truth!!! ;)

Fun Fact!
Neptune was the first planet discovered by mathematical calculation rather than empirical observation.

Pluto: 1/6 Earth's mass;
1/3 Earth's volume;
50-70%rock ( at its core) and 30-50% ice ( as the mantle) with a 100-180km sub-surface ocean layer at the core-mantle boundary.
Surface is 98% frozen nitrogen with traces of methane and carbon monoxide.

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