Lunar mountain has eternal light

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Lifer
Jan 7, 2002
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There is a "peak of eternal light" on the Moon - a region from which the Sun never sets, according to astronomers.
A team led by Dr Ben Bussey of Johns Hopkins University in the US looked at images of the Moon's poles taken by the 1994 Clementine lunar spacecraft.

The researchers produced a movie to show how illumination over the regions changed during a whole month.

They found four areas on the rim of Peary, a 73k-wide crater, that appear to stay light for the entire Moon day.

'Peak of eternal light'

The Moon's rotational axis is tilted about 1.5 degrees relative to the plane of the Earth's orbit around the Sun.

As a consequence, the Moon has small but detectable seasons, and dramatic lighting conditions at its poles.

The low axial tilt means there are crater floors and the poleward-facing sides of crater walls that never see the Sun at all. But are there mountains or the tops of crater rims, astronomers have long wondered, that always protrude into the sunlight?

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