Saturday, September 26, 2015

Guide to view and photograph the eclipse – La Voz del Interior

The most important fact: the Cordovan sky tonight will be “somewhat clear”, according to the National Weather Service. The clouds in the dark night and a moon of blood. A dark Postal hopefully we can see.

Tonight will be a lunar eclipse with several special seasonings. In reality it will be a red superluna eclipse and end of a tetrad.

Graphic Bigger, red and overshadowed

Click on image to see the chart in full size

The phenomenon can be seen with the naked eye in Cordoba. It will start at 21.11, when you start the eclipse twilight (the most tenuous part of the shadow cast by the Earth). Its effect will be 40 minutes later, when it reaches to be a slight shading on the left side of our satellite.

At 22.07 the moon will enter the dense shadow (umbra). It will start dyed red by the left. At 2345 will have been completely flushed. This total eclipse will end at 0.23 on Monday.

Why not completely dark? The Earth casts a shadow, but no atmosphere. Filter reaches only part of the sun’s rays. Passes the reddish hues of which reach the TV. It is the same that occurs during a sunrise. The final color can vary from eclipse, according to the composition of the atmosphere of that day.

What is the difference with the phases of the moon? For the motions of bodies celestial, sometimes only we see a portion of the side of the moon that illuminates the Sun (waning or growing) or do not see anything (new moon). As the moon does not emit light, the illuminated part does not disappear before our eyes.

Why talk of a superluna? Moon’s orbit is elliptical, so to see is closer to Earth (perigee) and is 14 percent larger. That is a superluna. Anyway, if not a frequent observer lunatic not receive the difference. The last eclipse of superluna occurred in 1982. The next will be in 2033.

Final tetrad. A tetrad eclipse occurs when four occur in two consecutive years. Today will be the last. The previous ones were in April this year and in April and October 2014 were not in Cordoba.

How to take good pictures with the phone. It is difficult to achieve a good photo Moon with a cell, since it has no telephoto. For best results, you should go to a place with no light pollution and try to get this fixed cell with some support. Select the “night” mode to take pictures where there is less light. Or, an option for a longer exposure time. Can also serve to locate the moon as a reference near a building.

What do scientists do? NASA will use the LRO lunar probe to study the changes that occur on the surface of the moon during the eclipse. In fact, the temperature will drop more than 200 degrees, because the moon has no atmosphere protection as ours.

Everything will be very dark there, so telescopes can observe the faint flashes that occur when asteroids collide on the lunar surface.

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