pluto iau

What is the Smallest Planet in the Solar System?

Of all the planets in the Solar System. Mercury is now the regarded as the smallest, with a mean radius…

7 years ago

A new geophysical definition has been proposed by a team of planetary scientists, one which would result in a Solar…

7 years ago

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Once known as the 9th planet of the Solar System, Pluto is now classified as a "dwarf planet", a Trans-Neptunian…

9 years ago

So you’ve seen all of the classic naked eye planets. Maybe you’ve even seen fleet-footed Mercury as it reached greatest…

11 years ago