Anaxagoras. The centre of an important ray-system.
Timocharis is surrounded by a pale irregular nimbus and faint rays, most
prominently developed on the W. side of the formation.
Copernicus. Next to Tycho, the most extended ray-centre on the visible
surface. Some distance on the E., in E. long. 25 deg., N. lat. 11 deg.,
lies a very small but conspicuous system, and in E. long. 22 deg., N.
lat. 8 deg. a bright light spot among little hills.
Gambart A. A bright crater with large nimbus and rays.
Landsberg A. A light-surrounded crater on a dark surface, with
companions, referred to under the Third Quadrant.
Encke. There is a light-surrounded crater S. of this.
Kepler. A noted ray-centre. It is surrounded by an extensive halo,
especially well developed on the E., across the Mare Procellarum.
Bessarion. Two bright craters: the more northerly is prominently
light-surrounded, while its companion is less conspicuously so.
Aristarchus.--The most conspicuous bright centre on the moon, the
origin of a complicated ray-system.
Delisle. S. of this formation there is a tolerably bright spot on the
site of some hills.
Timaeus. A ray-centre.
Euler. Feeble halo with streaks.
Galileo. Between this and Reiner is a curious bright formation with short
rays, referred to in the Catalogue, under Reiner.
Cavalerius. A light streak originating in the W. wall, and extending on
to the Oceanus Procellarum.
Olbers. A considerable ray-system, but seldom distinctly visible.
Lichtenberg. Faintly light-surrounded.