In astronomy, there are many undiscovered, mysterious, and sometimes simply amazing phenomena, one of which is a white dwarf.Among the first to study these celestial objects engaged scientist Wilhelm Bessel.He found them by chance.The object of his original research was the brightest star - Sirius.Interest scientist caused an unusual trajectory of the planet, namely the fact that she was undulating.Bessel started looking for likely reasons that could lead to such a strange, in his view, the phenomena.
Constant monitoring of Sirius prompted scientists to think that in the immediate vicinity of the world is another, unknown, a star that is not visible, but its gravitational influence has a strong influence.This confirms the identification of periodical fluctuations in the movement of Sirius.Another discovery was made by an astronomer.He suggested that if the white dwarf is real, then the period of Sirius and unknown planet around their common center of gravity is roughly 50 years.Planet Sirius still attracts scientists from all over the world with its double mystery and remains a desirable object of scientific research.
If you just describe the white dwarf, it is the nature of the mysterious object, which is securely hidden away in remote corners of the universe and is the remnant of a star.In the old days, when the optical technique has not had such high resolving capability, it was believed that a white dwarf - a rare phenomenon, but now scientists say the opposite.According to American astronomers number of these entities exceeds 10 billion. That is 5% of the number of stars who allegedly are in our galaxy.
Scientists believe that dwarf stars - these are our closest neighbors.The white dwarf has an atmosphere, the thickness of which is equal to a few hundred meters, it is composed of many chemical elements known to mankind.For example, calcium, iron, hydrogen, titanium oxide, helium, and carbon.Its diameter is constant and is 40 000 km.There are two types of white dwarfs: hot and cold, with an atmosphere composed entirely of helium.As part of the first scientists found hydrogen storage, which is 0.05%.
dwarf planet behave like warmed cannonball, which changes temperature while radiating energy.The size of these celestial bodies are always the same.Astronomers have estimated the value is greater than their mass, the smaller their radius.
The white dwarf has only one kind of energy - heat.Its cooling can be compared to the cooling of a metal rod, which is removed from the fryer.First, the process is fast, but as soon as the temperature inside dropped, cooling becomes slow.
Scientists estimate for the period of a few hundred million years, the white dwarf luminosity fall by only 1% of the total solar irradiance.After billions of years of it may form a black dwarf.Both the body is poorly understood, but is of great interest and are constantly in the field of academics.
interesting example of calculating the weight of the person taking into account the force of gravity on the surface of the white dwarf.Suppose a person has a weight of 75 kg on Earth, then the Sun will be the weight of 2 tons, and the dwarf planet would increase it to 120-140 tons.
big star of the universe loses energy over millions of years, and dwarfs its economy and stretch the thermonuclear age, surviving more than a billion years.Puzzles is significantly greater than the probability of ways to solve them, but it is hoped that soon the veil of mystery will open.In particular, the recent active work carried out by astronomers from the University.Washington.
