Obverse. Photo © NumisCorner.com
  • 20 Dinara 2009, KM# 52, Serbia, Republic, 130th Anniversary of Birth of Milutin Milanković
  • 20 Dinara 2009, KM# 52, Serbia, Republic, 130th Anniversary of Birth of Milutin Milanković
Description

Milutin Milanković (1879–1958) was a Serbian mathematician, astronomer, climatologist, geophysicist, civil engineer and popularizer of science.

Milanković gave two fundamental contributions to global science. The first contribution is the "Canon of the Earth’s Insolation", which characterizes the climates of all the planets of the Solar System. The second contribution is the explanation of Earth's long-term climate changes caused by changes in the position of the Earth in comparison to the Sun, now known as Milankovitch cycles. This explained the ice ages occurring in the geological past of the Earth, as well as the climate changes on the Earth which can be expected in the future.

He founded planetary climatology by calculating temperatures of the upper layers of the Earth's atmosphere as well as the temperature conditions on planets of the inner Solar System, Mercury, Venus, Mars, and the Moon, as well as the depth of the atmosphere of the outer planets. He demonstrated the interrelatedness of celestial mechanics and the Earth sciences and enabled a consistent transition from celestial mechanics to the Earth sciences and transformation of descriptive sciences into exact ones.

Obverse

Depicts coat of arms of Serbia (with curved bottom of top crown, 2004–2010) surrounded by the country name (above) and an abbreviation of the National Bank of Serbia (NBS) written in Latin and Cyrillic letters.

The coat of arms of Serbia is a re-introduction of the coat of arms of the Kingdom of Serbia (1882–1918) adopted by the Republic of Serbia in 2004 and later slightly redesigned in 2010. The coat of arms consists of two main heraldic symbols which represent the national identity of the Serbian people across the centuries, the Serbian eagle (a white double-headed eagle adopted from the Nemanjić dynasty) and the Serbian cross. Although Serbia is now a republic, the coat of arms features the royal crown of the former monarchy.

The Serbian cross is a national symbol of Serbia, part of the coat of arms and flag of Serbia, and of the Serbian Orthodox Church. It is based on the tetragrammic cross emblem/flag of the Byzantine Palaiologos dynasty. It is composed of a cross symbol with four stylized letters "S" (С) in Cyrillic on each of its corners, heraldically referred-to as "firesteels", which historically originate as the Greek letters beta (β–Β).

РЕПУБЛИКА СРБИЈА-REPUBLIKA SRBIJA
•НБС-NBS•

Reverse

Depicts a portrait of Milutin Milanković, value on the left and above, name, dates of birth and death, on the right, date of issue below.

ДИНАРА-DINARA
20
2009
МИЛУТИН
МИЛАНКОВИЋ

Edge

5 reeded segments with 19 reeds each

20 Dinara

1st Coat of Arms

130th Anniversary of Birth of Milutin Milanković

KM# 52
Characteristics
Type Commemorative Issue (Circulating)
Material Copper Nickel Zinc
Weight 9 g
Diameter 28 mm
Thickness 2.06 mm
Shape round
Alignment Medal
Mint
Institute for Manufacturing Banknotes and Coins (ZIN)

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