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Shooting stars

between tonight and tomorrow morning will check 'the peak of the Perseid hourly. If you miss it there will be more showers during the year, or it can review in a year. The Perseids are the "shooting stars" in this period can be observed in many more 'big, because' e 'in this time of year the Earth passes through the area of \u200b\u200bits orbit around the Sun in which they are fragments of a comet, which, in contact with the atmosphere, producing the well-known phenomenon. The Perseids

name stems from the fact that the trajectories of several shooting stars all appear to come from the same point in the sky. At that point is the constellation Perseus.

Clearly, the constellation has nothing to do with shooting stars, since 'the stars that compose it are far more' distant of falling stars, which in reality 'are very close to us. As just one example, the star 'light of Perseus, Mirphak ( α Persei), and' to about 592 light years away, the most 'close, Algol, and ' to the 93, the most 'distant , Menkib in 1772 to. To get an idea, 592 light years are 5'600'793'600'000'000 km (more 'than 5 trillion: that's why you do not hardly ever use the Km in astronomy).

The phenomenon of falling stars instead occurs in a band that is around the hundred miles away from the ground, where the atmosphere and 'extremely thin compared to the level of the soil, but thick enough to burn, friction, a mote of matter (which may 'have such a weight of the order of 1 gram) that impacts at speeds of' order of 60 km / s (say more than 200,000 mph).

I observed the sky from a local 'mountain Saturday, August 9 and I've seen some that actually belonged to the Perseids, while other sources because they had a couple' their direction was almost 'perpendicular to that of the Perseids, and also the direction of an era opposite to that of the other.

The hourly rate of the phenomena and 'variable and on average is around 100. As with all astronomical observations and 'required patience, perseverance and some trick such as the choice of a place' is not polluted by light and fresh air, and let the eyes become accustomed to darkness'.

For me the evening and 'was an opportunity to make a few observations with telescope and enjoy the splendor of the constellations, stars (including Albireo, a beautiful double star), Moon, and that 'and then vanished, leaving the sky dark, even the Milky Way and Andromeda, visible, albeit with some difficulty', to the naked eye, given the clarity of the sky are rare cases where a "plain citizen 'can happen to see Andromeda with the naked eye because, as big, and' to about 2,500,000 years light away.

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Office Visio: pane of the Help for models

Can 'maybe it is that I do not watch some applications such as Office Visio (Microsoft Office, but I would say in general), with the proper perspective. The fact is that sometimes I find myself with the options to change and I can not find how to do it on line help. Even if you follow the logic and 'hard to know what to do. The case today and 'the box of "Help for the models." At the first use of Visio on your computer, the program asked me if I wanted to see the available models whenever they become available. Not knowing what it was and imagining that I really did see them only when they become available, I gave the OK. Then you open the box on the right (that area where there 's also the task pane' that I always keep disabled) with the guide to the models. But there 's nothing inside. So I do not care, at least for now. Well, but how do we disable that box now? Boh. Search in the help and 'difficult, especially when as in this case, no one knows exactly what to ask. I have to having lost an hour looking at various forms of information on the box shows the models in the help room, on line help, on the web in both English and Italian, on google groups in English and Italian. Too much stuff and off topic. I have tried in the settings of the bars, clashing with the bar of the reviews that even if you disable the next time you go to find her out of the way, I tried the resets, but it is not 'change anything.

(click image to zoom)

Then in a menu that was to serve to do more 'or less the opposite to what I wanted to do, explaining where to go to enable the views of some online content. So I followed the instructions. They say to go to menu "in line" I do not know if they are the translators who are casino or whether we are people that we must broaden our vision, but in this case, the help that was not "on line", but that local always available (perhaps "in line" here just means "always available"). In the task pane ' still there' and this guide online click "Online Content Settings " (the last entry in the bottom of the picture) you come to a square where there is 'a' box ceck "to enable dellafunzionalita ' I was interested in, or "Time out Help models if available." Without the check, and the box 'finally disappeared.

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laser point-star "


months ago I bought a laser to point at the stars and tell me who and 'close. It 's very beautiful green beam which emits. I also used to point the telescope while the camera was mounted on the eyepiece, making it impossible to look at and point the telescope optics: useful but not practical because 'to exit from the laser seeker and make sure that it is not aimed correctly and 'easy. But it 's better than going blind.
laserino Now I read 'the troubles' cause after a few seconds and 'on the luminosity' long haul. Actually it started doing almost immediately, but at first I did not realize I was also because 'the effect was more' reduced. The laser
I had got an electronics fair, and I paid, if I remember correctly, 30 or 35 €. I was not sure I would have been helpful 'cause I tried the purchase even though I knew that what you buy at the show and rarely' good quality '.
Anyway I had fun with laserino and I think I can just buy 'a better one. The ideal would be to take one of those mounted directly on the telescope and used in place of the seeker. Pero 'must be of high quality' because 'at that point must take the place of the seeker and must not fail.
chatting and watching pero 'classic laser pen is still useful when the ideal would be to have two ... We'll see
: depends on the costs and the desire to support them ... :-)