Third issue in this exciting series...
This beautiful 1 Oz Silver coin, with a real meteorite and yellow Antique Finsh quality, is the second issue of the series "Solar System". The coin depicts the Mercury surface on both sides, with a concave shape and the insert is a real piece of the NWA 8409 Meteorite. The coin is housed in a prestigious wooden box with Certificate of Authenticity. Extremely low mintage of 686 pieces worldwide!
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Availability date: 05/05/2016
Mercury is the smallest planet in the Solar System and the one closest to the Sun, with an orbital period of about 88 Earth days, which is much faster than any other planet in the Solar System. Seen from Earth, it appears to move around its orbit in about 116 days. It has no known natural satellites. It is named after the Roman deity Mercury, the messenger to the gods.
Partly because it has almost no atmosphere to retain heat, Mercury's surface temperature varies diurnally more than any other planet in the Solar System, ranging from 100 K (−173 °C; −280 °F) at night to 700 K (427 °C; 800 °F) during the day in some equatorial regions. The poles are constantly below 180 K (−93 °C; −136 °F). Mercury's axis has the smallest tilt of any of the Solar System's planets (about 1⁄30 of a degree). However it has the largest orbital eccentricity: at aphelion, Mercury is about 1.5 times as far from the Sun as it is at perihelion. Mercury's surface is heavily cratered and similar in appearance to the Moon, indicating that it has been geologically inactive for billions of years.
Mercury is gravitationally locked and rotates in a way that is unique in the Solar System. As seen relative to the fixed stars, it rotates on its axis exactly three times for every two revolutions it makes around the Sun. As seen from the Sun, in a frame of reference that rotates with the orbital motion, it appears to rotate only once every two Mercurian years. An observer on Mercury would therefore see only one day every two years.
The reverse of the coin depicts the Mercury surface, with very realistic details. What makes this coin unique is a real meteorite called NWA 8409, fallen on Earth in Northwest Africa, inlaid on the coin. On top of the coin the inscription "Solar System Mercury" and on the obverse side the effigy of Her Majesty Queen Elizabeth II.