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Luna in "filling the manual" The ozone hole

From Astri

On March 7, I photographed the Moon. The irony of this photo and 'I had to do I manually filling. In fact, the SLR camera to shoot must first lift the mirror. Only the movement is "dancing" the telescope. There 's an option to delay the capture of the camera than the tip of the mirror, and not only that' configurable delay and 'short. Approximately one second. This seems rather strange, but maybe I have not read the instructions carefully or the Nikon was a good idea and carried it out in the middle '... boh.
However, to avoid image blur and the only 'to obscure the telescope by placing an object in front and hold it for about three seconds after the shot, then remove it and put it back before closing the shutter. Although I have not done many tests, it seems to me that the closure creates a "movement" visible. The result is 'that the exposure time and' the time it the absence of the object that acts as a shutter, and therefore can not 'come down very low, I would say that in the second half and' hard. And for a long time can mentally count 'to be wrong time. However with a little 'test photos of the Moon and Venus can' cause people are easy (very bright). For however long the poses the real problem 'that the telescope does not have a good tracking, and then the photos are moved due to the fact that the object in the frame drifts. And we should be in a hurry: it takes three seconds to get a nice blur. In short, sucks.
If I want to do something I will have nell'astrofotografia 'switch equipment. I suspect though that may depend on the weight of the SLR, and that ' very large compared with small telescopes, and also magaridipende engine and / or mechanical worn. I might consider in this regard to seek technical assistance. We'll see.
Meanwhile, there are these photos still show the limits of the telescope, magnifying the image is clearly seen that it is not 'clear. Even with the camera similar details are sharp and with that there 'tracking well to meet the shortcomings of digital telescope. And I did many tests focus never exceed these results. Also this could be a reason to change equipment. For now, however, 'there are others who tell me not to change gear and let it go for a while' ... :-)

What Cancels Out Black Circles Nw Or Nc

Here is a brief summary for those who want to get a general idea of \u200b\u200bthis problem. Or for those who want to get some ideas for a school.

The atmosphere 'un'involucro gas that surrounds our planet. It 's very thin compared to the size of the Earth: the most' consistent and it 'thicker than a few tens of kilometers and it' consists of five main layers: troposphere, stratosphere, mesosphere, ionosphere, exosphere. The troposphere and 'the top layer' below, while above it is the stratosphere. While the troposphere and 'maximum thickness of about 20 km to reach the stratosphere about 50 km and is' in turn composed of several layers. A layer in detail and 'made up of ozone.

Ozone 'a gas whose molecules consist of three oxygen atoms. It 's a very reactive gas and then and' poisonous to living things. However, and 'essential to life on Earth, and when' can absorb ultraviolet radiation of UV-B type from the Sun

The ozone layer can 'be destroyed by certain gases used by man: Chlorofluorocarbons, or CFCs.

CFCs are used as refrigerants for refrigerators and air conditioners, as propellants in aerosol and to produce foam. They are also emitted by flights of supersonic aircraft.

To try to remedy, the use of CFCs and 'was almost completely abolished. These gases, however, 'remains in the atmosphere for long, even for centuries.

is, however, those who claim that CFCs are not responsible for the problem.

The ozone hole and 'temporary reduction of the ozone layer (also known as the ozone layer) that occurs periodically during the spring in polar regions. With the "ozone hole" is also generally indicates the reduction of the ozone layer that has' seen since the 80's.

As already 'mentioned, ozone acts as a filter for ultraviolet radiation: it almost completely blocks the transmission the layers' lower atmosphere. Ultraviolet rays can cause damage to the skin (melanoma) and eye (cataract), and may reduce the ability 'of photosynthesis in plants, producing, as a consequence, a decrease in quantity' of crops. Radiation can also destroy part of the phytoplankton, a group of organisms in the plankton on the surface of the sea: it is' important because it is' at the base of the food chain for many ecosystems and aquatic and 'able to produce organic substances in from inorganic substances dissolved.