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Scientists have identified a huge rectangular feature on the Moon that is buried just below the surface.
The 2,500km-wide structure is believed to be the remains of old rift valleys that later became filled with lava.
Centred on the Moon's Procellarum region, the feature is really only evident in gravity maps acquired by Nasa's Grail mission in 2012.
But knowing now of its existence, it is possible to trace the giant rectangle's subtle outline even in ordinary photos.
Andrews-Hanna and colleagues note that the Procellarum region contains a lot of naturally occurring radioactive elements, such as uranium, thorium and potassium.
originally posted by: Kandinsky
a reply to: game over man
Here's the image from the BBC link >>
The 2500km 'rectangle' looks like a blast-site to destroy the evidence of the Moon being towed into Earth's orbit.
originally posted by: Astyanax
a reply to: Battlefresh
There is another picture at the link that makes it seem more rectangular. It probably depends on the angle.
Anyway, whatever shape it is, Tycho is right in the middle of it.
Cue Ligeti's Requiem...
originally posted by: Xcathdra
originally posted by: Kandinsky
a reply to: game over man
Here's the image from the BBC link >>
The 2500km 'rectangle' looks like a blast-site to destroy the evidence of the Moon being towed into Earth's orbit.
Rectangle...
Looks more like a Hexagon to me.
Iapetus -
Saturn - North Pole
Mercury -
Titan -
Eros -
Procellarum's giant rectangle does the same, too - because the entire feature is draped over a sphere. This means the angles at the corners are wider than 90 degrees. "What we're seeing is a clever trick of spherical geometry. For structures on this scale, a polygon with 120-degree angles at the corners actually has four sides instead of six," explained Prof Andrews-Hanna.