Because the planet Mercury is “tinted” unusually black

The surface of Mercury is unusually dark -much more than… of the Moon – and now scientists, after much reflection, they think they know the cause: the planet has plenty of carbon in the form of graphite (the material used in pencils).
The researchers, led by Patrick Πεπλόφσκι of the Laboratory of Applied Physics of University of John Hopkins, who made the relevant publication in the journal of geosciences “Nature Geoscience”, analysed the data sent by the ship “Messenger” (Messenger) NASA, just before accomplish the mission of impacting on the planet in April 2015.
Scientists consider it likely that once all of the surface of Mercury was covered by a layer of graphite, which can reach a kilometre in thickness. But later, the volcanic activity pushed a large part of this coal in the bowels of the planet. But the surface is very dark yet, as well as amounts of toner remained and mingled with rocks.
A high mountain in Ceres
A year closes the vessel “Dawn” (Dawn) of NASA in orbit around the dwarf planet Ceres, the largest body in the asteroid belt between Mars and Jupiter.
As announced by the American Space Agency, the most impressive discovery came to light -as well as arriving all new images in the Earth – it is that Demeter has a surprisingly tall mountain, “Αχούνα Mons”, which reaches five miles in height. It is a mountain with a steep but smooth slopes.
“No one expected to Demeter a mountain like Mount Αχούνα. We do not yet have a satisfactory theory for how it formed,” said Chris Russell of the University of California-Los Angeles (UCLA), chief scientist of the mission “Dawn”.
The ship, before Demeter had put in orbit around the big asteroid Hearth.