What is "arrhenius"

Arrhenius is a lunar impact crater that is located just on the far side of the Moon, near the southwest limb. In this location the vicinity of the crater can be viewed during favorable librations, although it is viewed from on edge. To the south-southeast is the worn crater Blanchard, and De Roy lies further to the west.

The outer wall of Arrhenius has been somewhat worn and eroded due to a history of minor impacts, leaving the rim rounded and low. There is a knotch in the rim to the north-northwest, and an outward bulge along the southeast face. A small craterlet lies across the southwestern rim. The inner floor is relatively flat and free of features of interest. The midpoint lacks a central peak.

This crater lies within the Mendel-Rydberg Basin, a 630 km wide impact basin of Nectarian age.

Arrhenius may refer to

• Carl Axel Arrhenius (1757–1824), Swedish chemist and discoverer of the element yttrium
• Niklas Arrhenius, Swedish discus thrower
• Svante Arrhenius (1859–1927), Swedish physical chemist and 1903 Nobel laureate
• Arrhenius equation, a formula for modeling the temperature dependence of reaction rate constants.
• Arrhenius (lunar crater), named for Svante Arrhenius
• Arrhenius (Martian crater), see List of craters on Mars
• 5697 Arrhenius, main-belt asteroid, named for Svante Arrhenius

Arrhenius is an impact crater in the Eridania quadrangle on Mars at 40.3° S and 237.4° W. and is 129.0 km in diameter. Its name was approved in 1973, and it was named after Svante Arrhenius. Evidence of previous glacial activity is evident in images. There also appear to be branched channels just outside the crater.

Wikiarrhenius.jpg|Arrhenius Crater, as seen by CTX camera (on Mars Reconnaissance Orbiter). WikiESP 034164 1405arrhenius.jpg|Glacial features in Arrhenius Crater, as seen by HiRISE under the HiWish program. Arrows point to old glaciers.