Triton is the largest moon of Neptune and is almost the same size as our own Earth's moon!   Neptune is seen here some 220,000 miles (355,000 km) away - closer than our own moon is to Earth.   Triton (2,700 km in diameter) is the largest satellite in our solar system known to revolve in a direction opposite to the planets' own spin.

Also holding the title as being 'the coldest - yet-discovered - body in our solar system' Triton is a mystery in many ways! The landscape of frozen nitrogen is hard as stone with a temperature of -235 degrees C.

Perhaps its' secrets lend credence to the legend that Triton is something other than a 'natural' moon?

The space-farers in this view are intrigued and puzzled by something (unseen by us) inside this strange edifice! Dissimilar in shape and appearance to the frozen landscape - this 'anomaly' may also be a stranger to Triton as are the explorers!

Perhaps what appears as a crater from our viewpoint is really a 'hatch' or 'entry-way' into something far-larger that was long ago buried under the frozen surface!   Even an entrance into the interior of this strange moon itself should not be discounted!