"Let us examine old _Copernicus_!" This grand crater is deservedly considered one of the greatest of the lunar wonders.

It lifts its giant ramparts to upwards of 12,000 feet above the level of the lunar surface.

Being quite visible from the Earth and well situated for observation, it is a favorite object for astronomical study; this is particularly the case during the phase existing between Last Quarter and the New Moon, when its vast shadows, projected boldly from the east towards the west, allow its prodigious dimensions to be measured.
After _Tycho_, which is situated in the southern hemisphere, _Copernicus_ forms the most important radiating mountain in the lunar disc.

It looms up, single and isolated, like a gigantic light-house, on the peninsula separating _Mare Nubium_ from _Oceanus Procellarum_ on one side and from _Mare Imbrium_ on the other; thus illuminating with its splendid radiation three "Seas" at a time.

The wonderful complexity of its bright streaks diverging on all sides from its centre presented a scene alike splendid and unique.