: See this thread for background on this project: Moon Zoo ChallengeLocation
:Site: Floor of Tycho crater.Images
: Anthony CookDescription
: Cracks like these are interesting, especially if there are few or no craters around them, especially if they are small isolated cracks with evidence of surface disturbances adjacent to the cracks.Interest
: Surface features that may have been freshly disturbed or contain a vent from which outgassing has occurred
The majority of Transient Lunar Phenomena (TLP) are covered in the other TLP Project threads on this board. This thread concentrates on the remaining TLPs, Deep Seated Fractures
Phenomena (if you think there are others not mentioned in these threads please PM one of the moderators).
Deep seated fractures can be found on some images from LROC but “Atmospheric” phenomena will probably not be found. Some images taken during the Apollo project had fuzziness along the horizon when it was expected that the horizon would be sharp-edged. This may have been caused by dust particles suspended above the lunar surface by electrostatic charging.Deep Seated Fractures
The one feature which Anthony mentioned and which is not covered in the other TLP Project threads is deep seated fractures and he uses an example from the floor of Tycho crater:
Tycho Crater floor, from LROC image M114031031LE
Anthony also says about these fractures: Cracks like these are interesting, especially if there are few or no craters around them, especially if they are small isolated cracks with evidence of surface disturbances adjacent to the cracks.
One of the Moon Zoo users, ElisabethB (Els)
has found something similar near Proclus crater:
Sun Angle: -76.23°
Scale: 0.50 meters / pixel
Zoom Level: 3
Post any deep seated fractures you find in this thread.”Atmospheric” Phenomena
Apollo 17 astronauts saw and sketched what they called “bands”, “streamers” and “twilight rays” which were visible just before lunar sunset or sunrise. These rays were also seen by astronauts on the Apollo 8, 10 and 15 missions.
from Nasa Media Library
On the side of the Moon in daylight, solar radiation knocks electrons out of atoms and molecules in the regolith causing a positive charge to build up which is sufficient to loft particles, 1 micron and smaller in size, above the surface. These particles can go up more than a kilometre.
The Moon seems to have a tenuous atmosphere of moving dust particles. We use the word 'fountain' to evoke the idea of a drinking fountain: the arc of water coming out of the spout looks static, but we know the water molecules are in motion. In the same way, individual bits of moondust are constantly leaping up from and falling back to the Moon's surface, giving rise to a "dust atmosphere" that looks static but is composed of dust particles in constant motion.
It is believed that the dust on the night side of the Moon is negatively charged due to electrons from the solar wind flowing around the Moon onto the night side. So at the Moon’s terminator between the positively charged dust of the daylight side and the negatively charged dust of the night side, there could be flows of dust which may resemble auroras.
The four links below from NASA discuss various aspects of this phenomena:Moon FountainsMoon Dust in the WindMoon StormsLunar Transient Phenomena