Cook Islands – 2009 – 1 Dollar – 7 Wonders of Nature AURORA BOREALIS (PROOF)

Description

Diameter : 40.0 mm

Weight : 27.0 g

Composition : Cu silver plated with padprinting

Mintage : 5 000

Auroras, sometimes called the northern and southern (polar) lights or
aurorae (singular: aurora), are natural light displays in the sky, usually
observed at night, particularly in the polar regions. They typically occur in
the ionosphere. They are also referred to as polar auroras. In northern
latitudes, the effect is known as the aurora borealis, named after the
Roman goddess of dawn, Aurora, and the Greek name for north wind,
Boreas by Pierre Gassendi in 1621.