Month: August 2011

The Planet Mars

The sun slowly sinks towards the horizon. Here it sunk elk for the distant forest. Gradually darkens the sky. Unnoticed for been burned one star. Then another. Them more. But here note one bright star.

All bluish, and it is reddish. Remember where it is visible, close to what the stars. At some distance from them. Look a few days. It turns out that the red asterisk crept away to the side, move las between the stars.

All the stars are fixed, but this walks . Its people have noticed long ago. Its color, it resembles a light or a distant campfire flames. Superstitious people in the red planet seemed offensive disaster. They were afraid of her and called Mars, in name of the god of war. The average distance of Mars from the sun 228 million miles, it's a half times greater than the distance of Earth from the Sun. Therefore, heat and light from the sun Mars receives less than the Earth. Let's look at Mars in a large telescope. On the surface are visible some spots. Dark. Bright. Maybe it's the sea, forests, deserts, mountains? What if Mars – is a whole new world? A whole new "Earth"? Far, far away, but close to us, like, clear. Mars – a little Planet. Its diameter at the equator is 6,780 kilometers, which is only twice the diameter of the moon. By volume of Mars smaller than Earth is almost seven times. At Mars has two satellites, two tiny "moon". They gave the name of Phobos and Deimos, which means "fear" and "horror". Mars is shrouded atmosphere. Martian air is much more sparse than the Earth. And the composition is not so. There is almost no or even not at all the oxygen we breathe. It's cold on Mars, or hot? In the hot spot of the planet, at the equator, summer at noon is usually around 25 Celsius. But this afternoon. Mars does not know the warm evenings and soft summer nights. Stands where the sun sink toward the horizon, it becomes colder. At night comes the frost, so what! Even on the equator at night the temperature falls to a hundred degrees below zero! Why is this happening? It turns out that this happens because of the thin air. After all, "blanket" for the planets is the atmosphere. Day of the solid surface is heated sunlight. At night it cools down. And if the atmosphere is dense, like Earth, it is like a thick quilt envelops her. Atmosphere and trapping heat near the Earth. The Martian atmosphere is also due to the sparsity can not retain the heat from planet's surface. Duration Martian days 24 hours 37 minutes, almost the same as on Earth. On the surface of Mars are dry arid desert. But if there is any life, recognize only the first interplanetary biological station, which will travel to Mars. Automatic stations specified density and composition of the Martian atmosphere. The scientists found that Mars is more suitable for settlement than Venus. Rarefied atmosphere, low temperature, a small amount of moisture – all, with what face on Mars settlers from Earth, and overcome the current level of science and technology.

Plasma Screen

Plasma TVs have appeared recently. But this did not prevent these electronic devices to win the hearts of buyers. And not for nothing. The main advantage of plasma screens – a little thick. In this way, they can hang on the walls and any other plane. In our small apartments it helps acquire more space, "air". Image of plasma screens do not flicker, but it means that the eye strain decreases and they are less fatigued.

Sharpness of the image equally across the field. Complements it all, great visibility from any angle and high contrast images. Plasma panels do not have X-ray radiation and because of this there is no negative impact on health. The largest size of the screen diagonal mark in the long-jumped 60 inches, and thickness of panels is becoming smaller. Now the image on plasma screen considered the most vivid and contrast.

In the early 60's a small company in America began production of plasma displays. But then they are very expensive and the cost reflected the only two colors. Career took off plasmas began in New York Stock Exchange. They needed the big screens, so that more people could see the change of stock price. Improved technology, increased quality and increasingly developed an interest in plasma screens. And what is the difference of plasma lcd tv? In lcd monitors, black color looks more like dark gray, but not perfectly black. It comes from the fact that they contain lamp to illuminate the matrix to colors were more vivid. It blurs the blue-black. Plasma TVs have no backlight. Each cell in the matrix of lights. Therefore, black – it's black. And the 'plasma' and the lcd have comparable periods of work, an average of 40-60000 hours. In soon to be released new television sets, which differ from the plasma or lcd models. They are based on so-called technology of color lasers. They will be much smaller, and more importantly, a bit cheaper widescreen models using plasma. I wonder if they can reach such a high popularity as plasma screens? Source: Absolute Audio