Langrenus is a large crater about 132 km in diameter and 4.5 km deep, located near the eastern limb on the side closest to the Moon, east of Mare Fecunditatis.
From a structural point of view, the Langrenus crater can be divided into three main areas: 1. the bottom of the crater, 2. terraces and sidewalls and 3. the central peak.
Its formation is unusual, the southern half is covered by a homogeneous material of smooth appearance with little mineralogical diversity, what seems to be the melting of the impact. These materials can be traced, even in deposits outside the crater itself, reaching a distance of 50 km from the edge of the crater.
Another peculiarity is its disorganized walls. With terraces stepped, but not fragmented and uneven. In fact, although it is similar to craters like Copernicus, its walls have irregular faults without a system of administration of these well-defined faults.
But if something catches the eye on Langrenus is its complex central peak of very light colors. It has a curious form of Z, with several groups of well-defined peaks. The complex dense peak rises to more than 2000m and spectral analysis indicates that mainly consists of troctolite a mafic rock also formed by calcium plagioclase and olivine. Troctolites are rocks apparently originating in the deepest layers of the crust, where it interacts with the mantle. For the time being, seven craters with troctolite-rich central peaks have been identified: Copernicus, Teofilo, Langrenus, Tsiolkovsky, Keeler and Crookes. All located in the equatorial belt. Undoubtedly, it is a very interesting peculiarity, and several hypotheses were proposed to explain the origin of these materials rich in olivine, which in any case is quite deep in the lunar crust but with the violence of the impact was brought out.
Source: Observar El Cielo - Patrício Domínguez
Adaptation: Avani Soares
Photo made with all the adverse conditions, only to kill the longing for the giant of the solar system.
After a storm of flooding, the sky partially opened, I cheered and left the C14 acclimatizing.
Unfortunately in the morning when the star had already reached a better altitude there was a thick layer of clouds.
Even so, I pointed my sticking-glass and put the camera in the clear sky.
The air was very calm but as expected the clouds stole every definition of the photo.
I have high hopes for this season because Jupiter had reached a much higher altitude than last year, for now I have to be content with this result.
Burg, maybe Ancient Burg?
Looking at this photo with such a low angle of illumination I could not help but remember Ancient Newton.
Who knows Ancient Newton?
A huge ghost crater just below Plato?
Well, although little considered it has long been known as a classic ghost in which traces of its walls remain in the form of Mons Pico and Montes Teneriffe.
Well, look at this photo calmly, see the big hoop around Burg! How do you feel?
Wow! Now you thought like me?
There does not seem to be an old underground crater.
Crater that must have had its floor completely filled by lava forming the Lacus Mortis and that later to undergo the impact that originated Burg brought even deeper modifications.
Even the fractures on the ground in the shape of Rimae seem to recall that there was a cracked floor crater that was heavily deformed by the impact caused by Burg.
Yes my friend, the next time you look at the Moon you must do this with a very pronounced critical sense, many things must be only the result of our imagination but who can be sure ....
Text: Avani Soares
Has anyone read anything about this, or do you know of any source of reference on the subject?
I found a brief reference in the book "Exploring the Monn" Through Binoculars and Small Telescopes, Ernest H. Cherrington, Jr.
My great friend Charles Wood said he was sure it "should" be described in "The Moon Modern" but there is no official name, he suggested calling "Lacus Mortis Crater" I still preferred to call "Ancient Burg Crater".