Posidonius crater

[astroavani]

Winding canals are striking features resulting from the turbulent flow of low viscosity lavas (very fluid), its high temperature erodes pre-existing surface. These turbulent fluid flow and generate eddies and vortices that can be highly erosive and result in twists and turns seen in many rilles. The rilles, located on the western edge of the crater Posidonius is a classic example.

Why scientists are captivated by winding canals? Part of the reason is purely aesthetic - each sinuous rille is different. Some winding canals are less curvy, others as Rimae Posidonius are like scribbles, while still others are so sinuous rilles that have curved horseshoe-shaped. Scientifically, however, meandering channels are exciting because it is possible to see tread layers which was cut during formation of the rille. In addition to exposing the layers cut by washing the rilles also gives an almost dynamic look at where the lava flowed, suggesting very high rates of effusion over long periods of time (often much higher than those typical of the earth). Some rilles are believed to contain pyroclastic deposits, which can tell scientists something about the volcanic history of the rille.

The rille that crosses the floor of Posidonius stretches across the west bank of the floor starting north of the crater and then turning to the south, has about 50 m deep with a width of about 1 km.

The global geology Posidonius can be seen in the attached image. The image clearly shows the flat plains that form the floor in the north and west where the rille is broken and the floor tilted on the eastern side of the crater.

The Rima G Bond, Chacronac and Romer are a simple toast in the picture!

Source: LROC - NASA, Arizona State University / Jeffrey Plescia, Lunar Networks

Adaptation and text: Avani Soares

In high resolution: http://www.astrobin.com/full/231111/0/?real=&mod=

[MarsG76]

I cant get over how much fine detail this image has and how much detail is captured by other also using the C14Edge...

Excellent pic of the Moon.

[michael.h.f.wilkinson]

Really superb detail once more. You really spoil us

[laudropb]

Great image and lovely write up as always.

[Astro Imp]

Wonderful but then we wouldn't expect anything less from you. Thanks.

[Grotemobile]

Amazing what a 14" scope

can do . Very good. A lot

of money, £6800.  Will

have to have a word with Santa.

Steve.

[Blazar]

Amazing what a 14" scope

can do . Very good. A lot

of money, £6800.  Will

have to have a word with Santa.

Steve.

Then theres the mount as well Steve.....so tack on another couple of grand.

I also think Avani is quite talented as well (its not all the scope) ;-)...plus he lives in Brazil, where I'm sure he must have a few more cloudless evenings than us!

Good work Avani.

[Grotemobile]

Could  not agree more with U Steve C. 

How do U find the 800 HD scope.

Very pleased with my CPC version.

Took this with mine, this year.

Steve.

[CATLUC]

Hello

Good shoot and great job.

Clear sky.

Luc

[astroavani]

Actually friends, Brazil is a huge country with a great diversity of regions and climates. I live right in the south, it is not the best place for astrophotography but also not the worst, so I can not complain. Currently the phenomenon of El Nino conditions worsened enough but is temporary, the worst problem I face are the currents of subtropical and polar jet for at least six months a year. Over the years, I tried to develop various techniques to circumvent these setbacks and the main use of IR Pass filters and high speed cameras.

Just really good telescope and openness do not make good pictures, there is a whole technique that should be developed behind a large photograph and of course, the minimum conditions for seeing in photos that require large increases and high resolution.

The good news is that even Telescope 8 "or more allow to obtain excellent records.

Yesterday tried a funding Jupiter (very low in my latitude) and had not used the IR filters work would be totally in vain.

See the proof in the photo below:

A filter IR Pass 742 and a 2X Powermate at the same time tried several pictures in color with an L filter and without porwermate and not getting success it was used.

[Blazar]

Could  not agree more with U Steve C. 

How do U find the 800 HD scope.

Very pleased with my CPC version.

Took this with mine, this year.

Steve.

Yes its a good scope...though I think I have just sold it....and the mount, and moonlite etc....I have been saving up for something a little larger on a new mount ;-)

I have had some good results with it on Jupiter though only really had one crack at Saturn.  Thats a good shot. I find the TVx2 barlow really works well with it.

[Mr Spock]

I always look forward to seeing your images. This one is just as stunning as all your others.

[Grotemobile]

I see U use a IR Pass 742 filter.

What is the difference between that ,

& a IR Block filter, which I use, Avani.

Steve.

[astroavani]

Hello Steve!

The larger the filter cutoff infrared light is less affected by turbulence, an IR 742 however is only possible to use with telescopes of 254mm or more. The drawback is due to the relative humidity which absorbs much in the infrared zone. Then IR filters should be used when the relative humidity and low and with larger aperture telescopes to really give a satisfactory result.