Scientists from the Tata Institute of fundamental research in India has found a way to detect a naked singularity. It is the object of infinite density, which is not closed from the outside observer the event horizon of a black hole. About it reported on the website Phys.org.
A singularity is formed when a substance of a very massive star begins to shrink because of the powerful gravitational attraction. This happens during a supernova, which produces a black hole. Because no known force in the Universe can not stop the compression, in the end, there is an area of space where the gravitational attraction becomes infinitely high. According to the theory of relativity, singularities are found inside black holes.
Under certain conditions, the event horizon may disappear (for example, if the black hole is massive and fast rotating), so the singularity is available for observation. In this case it is called bare.
Scientists believe that a naked singularity can be seen in the effect it has on the environment. So, any rotating around its axis an object such as a gyroscope, getting into the field of influence of the black hole, begins to describe a circumference around of this exotic object. The axis of rotation begins to waver (precessional). The closer to the event horizon is a gyro, the stronger the precession. However, if the event horizon is not, then the oscillation frequency does not change much.
According to the researchers, to distinguish a black hole from a naked singularity is possible, by observing the matter falling on the exotic object. The frequency of precession is thus possible to determine the wavelengths of the emitted x-ray radiation.
A group of mathematicians explained the emergence of the grandmothers. According to the theory called "grandmother hypothesis" that menopause is explained by the need to help the younger generation to raise children that increases the chances of further transmission of their genes. However, this theory does not explain when it came grandmother.
At auction in new York sold the official report of the Soviet cosmonaut Yuri Gagarin's first flight into space, made in the English language. The lot was sold for 47.5 thousand dollars, it consists of three parts: the title page of the report signed by the astronaut and pictures of him in the suit.
American and German scientists showed that people who do not smoke and are not obese, and moderately drink alcohol, live on average seven years longer than others. A study published in the journal Health Affairs, and briefly about it reports the max Planck Society (Germany).
Deputy Chairman of Russian government Dmitry Rogozin is ready to arrive in Moldova by helicopter or motorbike. "The Prime Minister of Moldova considers that "Rogozin is expected to fly on military aircraft". Well. Then on the Moldovan authorities: a helicopter or motorbike?" — the politician wrote.
Armed Palestinians broke into a house in the Jewish settlement of Halamish in the West Bank of the Jordan river and attacked were people in the room, killing two men and one woman. Another woman with serious injuries was taken to hospital. It is reported by The Times of Israel.
Russian high jumper height Maria Laecken won the stage of the Diamond League in Monaco. 24-year-old Russian excelled with a score of 2 meters. Second place went to Ukrainian Yulia Levchenko, she obeyed, the height of 1.97 meters. Third place went to American Vashti Cunningham (1,97 m), it took her more attempts.