Niuafo'ou
Denominazione ufficiale: Niuafo'ou
Official name: Niuafo'ou
Superficie: 15 km²
Popolazione: 650 ab. (2006)
Appartenenza: Regno di Tonga
Tipo di governo: Monarchia
Area: Tonga, Oceania.
Fuso orario: UTC +13
Prima emissione: 1983
Ultima emissione: Attuale
Per saperne di pił: http://it.wikipedia.org/wiki/Niuafo'ou
Soggetto: the early heavy bombardment Anno: 1989 Notizie: Between 1989 and 1993 Niuafo'ou (Tin Can Island) issued a series of stamps depicting phases in the history of the Earth. Among these is a stamp showing the early heavy bombardment of Earth's crust by cosmic debris. The Earth and the other terrestrial planets (Mercury, Venus, Earth, and Mars) -- as well as Earth's moon -- experienced a major era of bombardment from 4.5 to about 3.9 billion years ago called the early heavy bombardment . Large impacts occurred frequently during this period. After this the cratering rate declined exponentially. Later impacts (after 3.3 billion years ago) occurred much less frequently and the impactors were smaller. |
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Soggetto: the history of the Earth Anno: 1989 Notizie: Also in 1989 Niuafo'ou issued a miniature sheet depicting the history of the Earth for the World Stamp Expo '89 held in Washington, D.C., USA. The sheet incorporates slightly altered images from the earlier 1989 set of stamps. Events range from the early heavy bombardment, shown at the upper left (basically the same image as #108 above), to the first manned lunar landing, shown at the lower right. |
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