Aidomaggiore Il solstizio d'inverno nel nuraghe Sa Jua

Sin (mitologia)
Sin (Akkadian: Su'en, Sîn) or Nanna (Sumerian: DŠEŠ.KI, DNANNA) was the god of the moon in Mesopotamian mythology. Nanna is a Sumerian deity, the son of Enlil and Ninlil, and became identified with Semitic Sin. The two chief seats of Nanna's/Sin's worship were Ur in the south of Mesopotamia and Harran in the north.

The original meaning of the name Nanna is unknown. The earliest spelling found in Ur and Uruk is DLAK-32.NA (where NA is to be understood as a phonetic complement). The name of Ur, spelled LAK-32.UNUGKI=URIM2KI, is itself derived from the theonym, and means "the abode (UNUG) of Nanna (LAK-32)".
The pre-classical sign LAK-32 later collapses with ŠEŠ (the ideogram for "brother"), and the classical Sumerian spelling is DŠEŠ.KI, with the phonetic reading na-an-na. The technical term for the crescent moon could also refer to the deity, DU4.SAKAR. Later, the name is spelled logographically as DNANNA.
The Semitic moon god Su'en/Sin is in origin a separate deity from Sumerian Nanna, but from the Akkadian Empire period the two undergo syncretization and are identified. The occasional Assyrian spelling of DNANNA-ar DSu'en-e is due to association with Akkadian na-an-na-ru "illuminatior, lamp", an epitheton of the moon god. The name of the Assyrian moon god Su'en/Sîn is usually spelled as DEN.ZU, or simply with the numeral 30, DXXX.[1]

http://en.wikipedia.org/wiki/Sin_(mythology)