About the secrets of the heavens and the objects contained in it, there are celestial bodies most frequently observed that star man. In this universe there are billions of stars like our sun. However, the size and nature of its many differences and special characteristics. After collecting from various sources, there are some interesting facts about the star of which is:
A. Actually, only a very few number of stars we can see with the naked eye, the rest we can not see because it is far away and not bright enough. Of all visible stars apparently larger and brighter than the sun. More than 5,000 stars have brighter light that is the scale of more than magnitude 6, only a handful of very faint star has a size equal to the brightness of the sun, the rest are all bigger and brighter. Only 50 brightest star visible to the human eye from Earth, and the most bright star is Alpha Centauri star, 1.5 times more luminous than our Sun.
B. If anyone tells you that he has been counting the millions of stars just to see with the naked eye, immediately leave him, because what he said was a lie. In fact, you may not be able to see millions of stars in the dark night perfect though. You can not see a million stars in surface anywhere on earth. In the evening a truly remarkable sunny without a cloud, no moon and no light at all bullies, someone with a very good eyesight, may only be able to see the 2000-2500 star at a time.
C. Myth red color of a flame is the hottest color of the area, it turns out wrong. Red is the lowest temperature at which objects can be heated glow in visible light. When the heat is continuously improved color changes to white and finally to blue. So you see a red star in the sky that seem "cool" is the biggest star is not hot, blue stars are the hottest star.
D. In basically all star is a black body. In physics, a black body is an object that absorbs 100 percent of all electromagnetic radiation (light, radio waves, and so on). Like a brick oven with a painted black interior and only has a small window. All the light that shines through the windows is absorbed by the interior of the oven and not reflected outside the oven. It is a perfect absorber. This definition is in accordance with the conditions of a perfect star to have a very good star silencer. However, the amount of energy absorbed by the star is not proportional to the amount of energy emitted. That is, the star is a black body shining with great brilliance. In comparison reverse occurs in the Black hole sun, the amount of energy absorbed is greater, it is because the weight of very massive stars.
E. There is no green stars, although there are claims from observers star looks green, including Beta Librae (Zuben Eschamali). Most observers do not see the one green except the telescope optical effects. In physics this can be explained by the theory of the optical spectrum through. The fact that, of having a common color, from low temperature to a higher temperature, ie red, orange, yellow, white and blue. So there is no green stars.
F. The sun is a star "dwarf". For those of us who used to think the Sun as a star "normal", begin to change. But the good news is, that our sun is still young. In general, the size of starting age of "dwarf," "Giant" and "super-giant" (supergiants). The next stage is decay, supernova and star death. So technically, the Sun is a dwarf star, which continues to expand.
G. Black holes do not "suck" ?? Many people often describe as a black hole that sucks the hole and eat all the things around him. And it is a common concern for mankind, consider the black hole as a threat to the future existence of the earth when it was too close to him. But in fact, for some reason, black holes are generally not "suck." This is not only different definitions, such as the workings of a vacuum cleaner, not the same as how black holes pull matter. In the vacuum cleaner, the fan produces a vacuum so that outside air pressure becomes larger, pushing air into it, bringing together the loose dirt and dust. In the case of a black hole, there is no suction process involved. Instead, the material is pulled into the black hole with gravitational attraction is very strong. In a way to visualize it, like falling into a hole. Gravity is a fundamental force of Nature and all the material has it. When something is pulled into the black hole, this process is more like a fish drawn by anglers. The difference may seem trivial, but from the point of view of physics, it is fundamental. So black holes do not suck.
Thank you for reading this article. Written and posted by Bambang Sunarno. sunarnobambang86@gmail.com
author:
http://schema.org/Personal.
https://plus.google.com/105319704331231770941
name: Bambang Sunarno.
http://www.faradice.blogspot.com/2014/08/fact-yet-known.html
DatePublished: August 24, 2014 at 17:54
Tag : Fact yet known.
