HYPERION! Image credit: NASA / JPL / SSI / Gordan Ugarkovic

HYPERION! Image credit: NASA / JPL / SSI / Gordan Ugarkovic

Greetings Earthlings and welcome back!

Today, I would like to travel to Hyperion, one of Saturn's lesser known moons. Actually, it was the first non-round moon to be discovered!

This tiny moon measures to be 223.8 miles at its longest! Very tiny moon! In comparison, our Earth moon is 1,079 miles in radius!

Hyperion is a very strange moon due to its appearance. We still don't know why it looks like the fantastic space sponge that it does! There is some hypotheses that it could be a mixture of clay and ice! However, we have discovered that it has very dark material under its surface- darker than most moons of Saturn. What is it? Where did it come from?

How does it look spongy? This is still being experimented in laboratories. We think it might be due to its low surface gravity and very porous crust. So when an impactor hits it, the surface molds like putty, instead of shattering into a crater. Instead of ejecta, the material is flown back into space. 

Close up of Hyperion! Image credit: NASA / JPL / SSI / Gordan Ugarkovic

Close up of Hyperion! Image credit: NASA / JPL / SSI / Gordan Ugarkovic

Thank you for reading and we'll soar the skies with SOFIA next week!