Heyrovsky is a small lunar

impact crater An impact crater is a circular depression in the surface of a solid astronomical object formed by the hypervelocity impact of a smaller object. In contrast to volcanic craters, which result from explosion or internal collapse, impact crater ...

on the far side of the

Moon The Moon is Earth's only natural satellite. It is the fifth largest satellite in the Solar System and the largest and most massive relative to its parent planet, with a diameter about one-quarter that of Earth (comparable to the width of ...

. This crater lies just beyond the southwestern limb, in an area of the surface that is sometimes brought into view of the

Earth Earth is the third planet from the Sun and the only astronomical object known to harbor life. While large volumes of water can be found throughout the Solar System, only Earth sustains liquid surface water. About 71% of Earth's surfa ...

during periods of favorable libration and illumination by

sun The Sun is the star at the center of the Solar System. It is a nearly perfect ball of hot plasma, heated to incandescence by nuclear fusion reactions in its core. The Sun radiates this energy mainly as light, ultraviolet, and infrared radi ...

light. It lies within the southern part of the wide skirt of ejecta that surrounds the Mare Imbrium impact basin. This is a circular crater formation with an interior that is shaped like a bowl. The inner walls are simple in structure, and slope straight town to the small interior floor at the midpoint. The crater interior has a generally higher

albedo Albedo (; ) is the measure of the diffuse reflection of solar radiation out of the total solar radiation and measured on a scale from 0, corresponding to a black body that absorbs all incident radiation, to 1, corresponding to a body that refl ...

than its surroundings, giving it a somewhat brighter appearance.

References

* * * * * * * * * * * * Impact craters on the Moon {{Moon-crater-stub