How many stars, are there in the sky ?

Nobody knows how many stars are in the sky. No one knows, either, how the sky extending in all directions from Earth. This is of course the same as saying you do not know how big the universe. With each new telescope larger than the last, astronomers have continued to ensure greater distance. As we penetrate deeper into space, stellar distances.

Some astronomers believe, however, that can measure time through increasingly large telescopes to reach an area where there are no stars. Other astronomers do not see why not be extended without stars in all directions. For most of us it is equally difficult to imagine an end to space or imagine the space filled with stars that are endless and forever. There is even a theory that space can be curved.

the early days, before he had heard much of the heavens and of the science of astronomy, many people believed that the stars do not shine is during the day. The ancient Egyptians believed that the lights were lit every night by the gods, so that heaven could be more beautiful. They believed that the gods leave these flashlights by wires through the holes in the sky, and in the morning, and took them back.

The stars continue to shine all the time, day and night. We see in the day because of the atmosphere around the Earth is divided and diffuse sunlight in a light cover through which the stars are not visible. We can see through the environment, the night, the glow of the stars, because there is sunlight scattered. If there were no atmosphere, we could see the stars during the day and at night. The sun just seems like a clear hard light in a dark sky surrounded by thousands of twinkling stars.

To hide a total of sunlight, you can see the brightest stars and planets whatever happens to be in the sky at the time. When Venus, the brightest of the planets, is at its maximum brightness, you can see in the sky during the day, if you know where to look. It is also true that if we could climb high enough to get on a plane in the main part of the atmosphere, the stars would be visible at any time. The expression means starlight, both day and night.

Even at night, of course, the stars are often hidden from view. Clouds hide very effectively, as well as fog and mist. After traveling a great distance in space, rays of light coming from stars can at the end of the trip, is hidden from our eyes by a thin curtain of clouds above us.

Above the clouds or out through the halo of light around the earth, the stars are always shining. Day and night, in the light of the moon and sun, clear or stormy, which in turn raised constantly. So now, with this study, we can understand why the stars of daylight are not visible all around.

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How far the sky goes ?

When we speak of heaven usually means the vault of heaven, or the great arch that looks like a bowl dump on earth. They say the sky is blue, there are storm clouds in the sky or heaven stormy or clear. In this regard, we refer to heaven closer, the atmosphere in which our time and our whole sunset and sunrise colors occur. This is not the whole sky, but even if it is now believed that the atmosphere extends to a height of probably 600 miles above the earth.      watch videos

Beyond the sky and we see the colors change from one moment to another, sets the great universe of space. Sought through the atmosphere of this great sky beyond, planets, stars and galaxies move majestically on their trajectories. This universe is so vast that no one knows where heaven begins or ends. I do not even know if you have a beginning or an end.

Astronomers using their large telescopes have not yet found an end to the multitude of stars there. With each new larger telescope and were able to see further into the universe. The distances are so great that can not be measured in terms of miles, not more, and then measure the distance around the world in inches. Astronomers use a light year, the distance light travels in a year, in your opinion. This largely stem is long, 6,000,000,000,000 miles long.

Objects with the 100-inch telescope at Mount Wilson, California, astronomers have photographed are 240 million times 6,000,000,000,000 miles. So we know that the sky extends at least to date in all directions from Earth. With the new giant telescope on Mount Palomar, we may be able to explore the sky as 6,000,000,000,000,000,000,000 miles in all parts of the earth. We see that the stars grow less when we are so far away or perhaps no more stars, only time will tell.

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The fly is man’s enemy ?

During the Great War, a pamphlet was published in the army. With the title (in Roman Urdu called) Is Makhi KO maro. The military authorities were encouraged to publish by the fact that many soldiers suffering from dysentery complaints, typhoid and stomach. Most of these disorders arise from foods and beverages containing impurities and bacteria and germs were conducted to food in most cases by the housefly. In diseases caused by the war on the fly and its infection has caused more of causality in all the bullets and bombs of the enemy.           watch videos


The fly lays its eggs in rotting meat or vegetable matter. Therefore, young flies begin life in a dirty environment. This love of dirt is on the fly, as it is always ready to settle on a dead animal on a dunghill, or open wound. The next thing is sitting on the chapati maybe you will eat, or fruit that is found on a plate at home. Therefore, the germs of dirty objects in the area is transferred to the food. Can we afford to have an enemy in our homes?

What show was seen a few months ago by a physician health while visiting a bazaar, along a small street of houses and small businesses running in open drain. He ran along the dirty drain water in homes and children sitting openly to perform the function of the nature of it. Flies buzzed over the course of the flight. It was near a small candy store and cereals for sale. A large flat basket filled jelebi and had hundreds of flies sitting on the sweet stuff? No wonder that hospitals are full of cholera and dysentery, and many children die in their first year of life?

The fly should be declared enemy. Around our house, no food waste or garbage should be left where they can reproduce. Our food should be covered and houses sprayed with insecticide as flit. We must refuse to buy from retailers that allow their products to be exposed to all sorts of flies, and explain this. Only these vigorous measures can not our health and that of our family stays.

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What the stars are ?

 For the pastor or former astronomer at the beginning, a star was only one point flashing light in the sky, which seemed almost on the verge of being expelled by each passing breeze. Some thought of the brightest stars of gems set in massive dome of the sky. It was not until several centuries had rolled past some weary men have perhaps suggest that the stars are very large and very hot and bright as the sun, and its great distance only makes you look weak.
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Today we know that this is true, the sun is a star, and it is only because it is so close to us, which seems more important than the other stars. But this proximity is only relative, measured in ordinary terms, the sun is far away. If you should somehow be able to fly in the sun on a transport plane that travels at a speed of 250 miles per hour, should be started early in life, for more than forty years it takes to the trip! Well, if air plane is too slow, say you get a rifle bullet, traveling much faster than a plane. It would help, but we still take nearly five years to reach the sun.
The sun is the nearest star, and certainly the most important for us, the earth and other planets revolve around him, forming what is called the solar system. The sun we get all our light and our life. Like the sun, the stars are other large masses of incandescent gas, brilliant for them. It burned like a piece of coal or wood burning, and if it burns, everything was burned long ago. They are bright, incandescent lamps. Thus, the stars so bright, after a while, most of them show no change of any kind, even after many, many centuries have passed. Our star, the sun shines as it is now for at least several million years.
A star is a huge ball of glowing plasma bound by greatness. At the end of its life, a star can also contain a number of substances disintegrate. The nearest star to Earth is the Sun. Other stars are visible from Earth at night. Historically, the biggest stars of the celestial sphere were grouped collection and asterisms, and the brightest stars to add names. Extensive catalogs of stars have been accumulated by astronomers.

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Brain controls the motion of eyes

The eyes are not fixed. They are constantly in motion, object tracking, looking from side to side. Our eyes and in the eyes of other mammals, move together. Both are always directed toward what we want to see. Control of eye movements depends on the delicate nerve impulses from a specialized center in the brain. These messages cause the contraction of a set of six muscles that extend between the eyeball and the bone wall that surrounds it. Is the contraction of one or more of the muscles that move the eyes.
wach videosThe outer wall of the eyeball is comprised of three layers "of the fibrous layer and the retinal pigment layer. Fibrous layer is the outer protective layer of the eyeball. Is thick and durable. Much of this layer is turbid or opaque. ( An object is opaque so you can not see through it.) But in the center of the exposed part of the eye, the fibrous layer becomes transparent and is called the path cornea., the cornea is actually a small window otherwise one opaque layer. the remainder of the exposed portion of the fibrous layer is loosely referred to as the white of the eye.
The cornea and the white of the eye is constantly wet from the washing liquid and lacrimal glands. These glands under the blankets in the outer corners of the eyes, wash the main function. Other animals do not cry. One man uses the lacrimal glands, for love and for eyewash. The pigment layer in the fibrous layer. All the cells are filled with tiny grains of pigment color, hence its name. This corresponds to the surface layer of dark black, bedroom, and whose function is to avoid thinking of it. The pigmented layer, of course, does not extend completely around the eyeball. It extends under the cornea. If I did, I could not let the light in his eyes.
The retina is the innermost of the three layers of the eyeball. The sensitive layer is one which reacts when the light enters the eye. Thus, it can be compared with the film in which a shot with a camera. The retina is a cup-shaped structure located in the rear half of the eyeball. The highly sensitive layer consists of a large number of nerve cells. Some of these cells are connected to the brain by means of long strands of cytoplasm which extend outwardly from their cell bodies. These are long strands of nerve fibers. The fibers of the retina of each eye were collected in the bottom of the eyeball. Then pass into the brain monocable, the optic nerve wide.
When light enters the eye first passes through the transparent cornea. This small circle of transparent fabric is directly in front of the student. As you can see by looking at your own eyes in a mirror, the pupil is a small hole in the center of a ring of colorful fabric. The colored ring of tissue is the iris. When we say that a person has blue eyes or brown eyes, we mean that his irises are blue or brown. Iris was the name of the goddess of the rainbow Greeks, and this is the origin of the word.

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Sun the hottest star.

How hot is the sun? This is what is called burning hot or anything easily. Can you imagine the heat and the temperature of the sun? We can not even imagine the actual temperature of the sun. The sun is the largest member of our planetary system. Its weight is about 500 times more than anything else in our planetary system. The sun is very hot. Basically, is fifteen million degrees Celsius or 27 million degrees Celsius. If we use a magnifying glass so we can see the warmth of a hot sun and light too. But if you look at this way can damage the eyes and can also start a fire so be careful.        watch videos
The sun is the primary member of our solar system. This is the only planet or a star in our solar system that is large enough to undergo nuclear fusion center. Because the ability to produce as much energy shining. The planets in our solar system are also lighter that nuclear fusion can not occur. Its surface is frozen. And shine when the sun is reflected on the outside.
The sun is the hottest planet or star is quite old. This is about 4.5 million years ago and is still not enough to stop the burning homes. According to scientists, the sun shines for more than 5 million years. The sun is the combination of different gases and elements. It is composed of hydrogen and helium gas and the amount of hydrogen is 74% and 24% helium is. Sun not only the combination of hydrogen and helium, but the mixture of oxygen gas and some iron and a small amount of different bases.
The sun is composed of different layers. The outermost layer is composed of fire gases called thick or opaque (photosphere). Another is the layer (connective area) and is the layer where the heat is moved from the inner layer to the outer surface. The next layer is called (radioactive zone) and this is because the reaction between hydrogen and helium occur. The plot is washed and everything is hot no one can live on the surface of the sun and that is why there is no cure and no creatures can see there. The reaction gases and elements of several billions of years is hotter than you can imagine living in it. Scientists studied for many years, but has not yet found a solution how to send their spacecraft near the sun and always for human imagination.

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The eye and seeing

Almost all living things are sensitive to light. You know for example that the clam closes its shell when a shadow falls on it. This action is made possible by a number of special cells that line the edge of the shell. Light falling on these cells that excites them. Messages or nerve impulses then pass to the muscles that close the shell, and say that a simple reflex nervous completed.    watch videosBut this light sensitivity is very different from the vision. A clam can not be said of view, in the sense that man can see. Before you can actually see an animal has to have two things. First, there must be real eyes eyes, not just a shell. Second, the eyes must be connected to a well-developed brain. There are many animals eyes perfectly, is as good as ours, in fact, but see very little. The explanation for this surprising fact is that these animals have well developed eyes in relation to the brain that are still primitive. They can use their eyes and brain to respond to simple light reflex. But they can not really, because there are no centers in the brain controls vision.

For example, a fish may seem to prefer one type of bait to another. However, it is unlikely to actually see one of them. And certainly, you can make a conscious choice between them. This is simply because the fish were not vision centers. The eyes of all higher animals are fundamentally similar. Each eye is composed of a series of structures contained within a body of substantially spherical eyeball. Most of the eyeball is enclosed in a bone cavity in the front of the head, only a small part is visible from outside. The eye is partially hidden and surrounded by a variety of other structures, the eyelids, tear glands and ducts, muscles, blood vessels and nerves, to name just a few. Each has a special role to play in the eye body work efficiently.

The eye is most often compared to a chamber. In fact, the two are very similar. In both cases, a sensitive screen on which the light rays are focused. Both have a goal to focus. Both have a dark lining to avoid reflection and blurring. And finally the eyes and the camera can be adjusted to give sharp images at different distances. In the case of eye focus adjustment of objects at various distances is known as accommodation.

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