The husband of Bóann was Nuadu of the Silver Arm, also known as Nechtain. There is an astronomical interpretation to his name. William Battersby, author of "The Age of Newgrange" states that he thinks Nuadu was the Irish Orion. We agree. Nuadu was called "silver arm" because his constellation - the warrior-like grouping of stars we know as Orion - has an upraised arm which is buried in the Milky Way, which has a silvery appearance. The Boyne River is known as the "Great Silver Yolk" in the Dindshenchas, and we know the river was seen as the earthly reflection of the Milky Way in the sky because they have a similar derivation. The Milky Way was called Bealach/Bóthar na Bó Finne, the Way/Road of the Bright Cow. Boyne (Bóann) means Bright Cow. The apparent link between the heavenly Milky Way and the Boyne River is also interesting because the builders of Newgrange may have tried to replicate the Milky Way around the edge of the mound by using the milky white quartz which gives the monument its distinctive appearance. In the Stone Age, there were times when the Milky Way enveloped the whole horizon.