These massive cliffs seem to reach upwards to the blue planet (Dover V) in the sky overhead! The proximity of Dover V (only some 400,000 miles distant) to this planet - and each having similar mass - results in aggressive tidal actions that sweep both planets continuously. The roughly carved terrain of these great cliffs is indicative of the surfaces on both planets.

And the cliff areas extending above the water - here about 2,000 feet high - are only the visible sections! Like an iceberg on a colder planet - another 40,000 feet or more of these sheer cliffs extends downward below the surface of the sea.

Early explorations of both Dover IV and V have found virtually no sandy beaches, areas of flatlands, or high mountains. The extremely thin and inert atmospheric gases glow in the reflected light from Dover V - but on the side of Dover IV away from its twin and in the dark - no visible atmosphere can be seen! Only a light source from behind can reveal this rare glimpse!

Here the sea appears calm since it is at it's ebb. This is when the tide is at it's lowest point and occurs just before it 'turns' and begins to rise violently back to it's full! At high tide the waves will crash just below the rim-edge of these cliff-tops - and will, of course, sweep over any lower sections of the rim into the canyons beyond!

Dover IV is a rare occurrence! Almost no atmosphere but a very active ocean tidal system; and very little land area! A puzzle of science - why would the cliffs not be more worn down by the aggressive tidal action? Perhaps this is a very recent happening caused when these twin planets moved too close to each other following the passage of another planetary body through this system!