Lunar geologic timescale — The lunar geologic timescale (or selenologic timescale) divides the history of Earth s moon into five generally recognized geologic periods: the Copernican, Eratosthenian, Imbrian (upper and lower), Nectarian, and Pre Nectarian. The boundaries of … Wikipedia
Graphical timeline of our universe — This more than twenty billion years timeline of our universe shows the best scientific estimates of the occurrence of events since its beginning, up until anticipated events in the near future. Zero of the scale is the present day. A large step… … Wikipedia
Planetary science — Planetary science, also known as planetology and closely related to planetary astronomy, is the science of planets, or planetary systems, and the solar system. Incorporating an interdisciplinary approach, planetary science draws from diverse… … Wikipedia
Eratosthenes — of Cyrene (Greek polytonic|Ἐρατοσθένης; 276 BC 194 BC) was a Greek mathematician, poet, athlete, geographer and astronomer. He made several discoveries and inventions including a system of latitude and longitude. He was the first person to… … Wikipedia
Mare Frigoris — is the dark grey material in the lower portion of this photo Coordinates … Wikipedia
Mare Nectaris — Coordinates … Wikipedia
Mare Nubium — Coordinates … Wikipedia
Mare Smythii — Coordinates … Wikipedia
Mare Vaporum — Mare Vaporum. The crater Manilius can be seen as the bright circular object to the right of the mare. To the south Rima Hyginus is visible as a light colored thin line. In the upper left hand side of the photo is the mountain range Montes… … Wikipedia
Copernican period — Divisions of Lunar geologic time : Pre Nectarian Nectarian Early Imbrian Late Imbrian Eratosthenian Copernican The Copernican Period in the lunar geologic timescale runs from approximately 1.1 billion years ago to the present day. The… … Wikipedia
