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Monday, January 3, 2011

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Meteor shower of the Quadrantids Total Lunar Eclipse

The Quadrantids are one of the strongest meteor showers of the year, but observers may be disappointed if the conditions are not suitable. The point from which the meteors appear to emerge (the heating) is in the constellation Quadrans Muralis extinct. In our time the radiant is located where the constellations of Hercules, Bootes (the Herdsman) and Draco meet. The rain seems not to exist until about 11 pm Unfortunately, the radiant does not rise much for observers in the Northern Hemisphere before dawn lights will put an end to the show. The best comments are in countries with high latitudes such as Canada, Finland, Sweden and Norway and is practically exist for observers in the Southern Hemisphere.

The Quadrantids occur from December 28 to January 7, with a maximum of 3 night and early morning of Jan. 4. The Quadrantids are hardly observable at the beginning and end of this period, but observers in the Northern Hemisphere can see from 10 to 60 meteors per hour maximum.

The fact that the moon is about to enter the New Moon phase makes the most favorable conditions to observe this shower

This image depicts the view from mid-latitudes in the Northern Hemisphere around 1 am on January 4

Tuesday, December 21, 2010

Mydog Drags Her Back Legs

If you could keep all women in the world you wanted, what would you choose now? Sounds very tempting, but despite appearances is not an easy decision. That's what happens to me where I have iTunes songs to listen to for 7 days straight without repeating one. I always hard when I turn the iPod choose where to start, so many choices make me think too much and this decision takes more time than it should. No rant against the new, I have a lot of freak to want the last thing that comes out and the only thing that will not allow me my economy. And that's exactly where the issue lies. Today, although it is not correct, these payments Music is free, just need a powerful broadband connection, memory and patience, that is all that separates you from being the owner of your record store (virtual). The dream come true for any music lover from the beginning of time. Incredible, practical, but I can not feel nostalgic about when I could buy one or two discs per month. Why? Because values. Because anxious to return from the record store to listen to this album (cassette or CD) at home meant everything was to discover, hear many, many times, observe carefully the cover art (or whatever you put there), read the lyrics if included, making the most of the maximum was a conquest and hence the parallel with the first paragraph. As I write this I can be down ten albums (and archaic concept) which may not finish listening to whole or half and probably only one has the fortune to sound more than once, sad truth. It's like being rich and not know what to do with money. There is always much more.

Saturday, December 18, 2010

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and December solstice

ECLIPSE FULL MOON, DECEMBER 21, 2010

The last lunar eclipse 2010 d will be well positioned to observers in the Americas. The eclipse will occur 4 days before perigee.

The orbital path of the Moon will transit through the northern half of the shadow of the Earth's umbra. Although the eclipse will not be "central", the total phase will last 72 minutes.

At the time of eclipse, when the phase starts "eclipse" the moon will take a red-orange color.

In the photo, during an eclipse total de Luna in 2004, Moon on the right shows its appearance when the phase starts "eclipse" the moon in the center is maximum during the eclipse and the moon to the left shows the final phase of "total ".

Why the Moon looks red? During a total lunar eclipse, the Earth keeps sunlight from reaching the Moon. Astronauts on the moon to Earth would completely eclipse the Sun (would observe a 'ring' red around the Earth to see all the rising and setting of the sun that would be occurring simultaneously in the world) While the Moon remains completely within the shadow the umbra of the Earth, indirectly, the sunlight still manages to illuminate the Moon. However, this sunlight must first pass through the Earth's atmosphere filters out most blue light. What remains is a light red-orange color and is much weaker than the white light of the sun the earth's atmosphere also bends or refracts some of this light and a very small fraction reaches the moon and the lights.

If Earth had no atmosphere, then the Moon would be completely dark during a total eclipse. The exact appearance depends on how many clouds are present in the Earth's atmosphere. Total eclipses tend to be very dark after major volcanic eruptions since these events send large amount of ash into the atmosphere. During the total lunar eclipse in December 1992, dust from Mount Pinatubo caused the Moon was nearly invisible.

The total lunar eclipse of December 21, 2010, reaches its maximum at 8:16:57 UT, start taking a reddish hue when the total phase begins at 7:40:47 UT, the phase total end at 8:53:08 UT

Dar click to enlarge

entire event will be visible in North America and much of Latin South. Only the coast The Brazilian will miss the total eclipse stages because they occur after the moon is hidden. Likewise, Europe and Africa will experience the start of the Moon while the eclipse is in progress. Only northern Scandinavia you can see all the events in Europe. For observers in East Asia and the moon will eclipse the horizon. Any stage of the eclipse will be visible in the southern and eastern Africa, the Middle East or South Asia.

visibility zones according to NASA (dar click to enlarge)

These are the areas of visibility in stages, if you can not see your city on the map according to the stage, then this stage will not be visible.

During the high point of the eclipse, most of the East of Brazil will miss that stage. Cities such as Montevideo will have only a few minutes to see the maximum phase before hiding the moon, cities in Argentina to the maximum phase will occur with the Moon near the western horizon, observe achieved this stage but will miss the rest. Luna in Spain be hidden before the start of the peak stage, only able to observe the initial stages. Some areas of Portugal will get to observe the highest stage a few minutes. Only North American and Scandinavian countries will see from beginning to end the eclipse. Although as already mentioned, the best time, the maximum phase, the will see almost everyone in the Americas with the exception of the east coast of Brazil. The cities in central and western Brazil will see the eclipse at its peak phase.

SOLSTICE DECEMBER 21 December, will also be given the solstice (winter solstice for the northern hemisphere solstice summer for the southern hemisphere) Total eclipses of the moon during the Northern Hemisphere winter are common. There have been three in the last 10 years. However, a total lunar eclipse coincides with the solstice day is rare. According to data from NASA, the last time the two events coincided was in 1638, also by 21 December.

So be ready telescopes, cameras and binoculars. Or the naked eye, will be a great event to watch. Good weather at all!