A four-dimensional concept is now presented in a three-dimensional format.
A 2015 $2 coin in the name of Cook Islands visibly explains the
relationship between space and time, as created by scientist Hermann
Minkowski. Building on Albert Einstein’s 1905 Special Theory of
Relativity, Minkowski suspected the existence of a fourth dimension
(time, in addition to height, width and length), in which space and
time are connected geometrically, and he created a diagram
illustrating the connection.
The Prooflike half-ounce .999 fine silver $2 Space–Time Continuum
coin was issued by Coin Invest Trust. It was struck by B. H. Mayer‘s
Kunstprägeanstalt Mint in Munich, Germany.
The reverse of the coin depicts the Minkowski diagram, a geometric
illustration of the formula of special relativity, which is engraved
in one of the diagram’s columns together with the inscription
SPACE–TIME CONTINUUM. The center of the high-relief coin is marked
with a magnetic sphere, which can be removed.
The obverse, whose shape is a mirror or inversion of the reverse,
displays the Ian Rank-Broadley portrait of Queen Elizabeth II, the
issuing nation and the face value.
Einstein incorporated Minkowski’s ideas into his general theory of
relativity in 1915, six years after Minkowski died.
The coin measures 35 millimeters in diameter and has a mintage limit
of 1,500 pieces.
U.S.-based distributor Coin & Currency Institute is offering the
coin, for $95 each. Shipping and handling is $5.75 per order.
To order, visit the distributor's website.