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Star farthest from Earth discovered

02.04.2018

An international team of astronomers has discovered the most distant single star from Earth, located at a distance of 9 billion light years.

The discovery was made during observations with the Hubble telescope due to the "gravitational lens effect". The role of the lens that enhanced the light of the star and made it possible to see it through a telescope was played by the cluster of galaxies MACS J1149 + 2223, located at a distance of 5 billion light years from Earth. The discovered star is a blue supergiant, hundreds of thousands of times brighter than the Sun. Scientists named it Icarus.

According to Antonio Cava, a specialist in the department of astronomy at the University of Geneva, "the observation of such a rare phenomenon, when the brightness of a single star is increased thousands of times, provided a huge amount of information."

"This star is at least 100 times further away than the most distant star we could study so far, except for supernova explosions," said Patrick Kelly, lead researcher at the University of Minnesota.

The University of Geneva emphasizes that this discovery "marks the beginning of a new stage in the study of distant single stars."

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Self-hypnosis or allergies 06.07.2008

There are people who claim that they are able to feel radiation from electromagnetic waves, for example, from cell phone base stations, and that this radiation is harmful to their health. There was even a term "electromagnetic allergy".

English doctors from the University of Essex decided to test this statement. They put such sensitive people in a booth next to the cell-site antenna. The antenna was randomly turned on, and it emitted waves characteristic of mobile phones, then turned off. And the subject had to guess when dangerous radiations penetrate his body, and when they are not.

It turned out that the correct answers were given in about half of the cases, that is, at random. The test subjects said that in the cabin they were sometimes overcome with fear, excitement, they felt stress, and they believe that it was at such moments that they were irradiated. The control group consisted of people who did not claim to be able to feel radio waves. They, too, guessed the periods when the antenna was turned on about half the time, but they did not feel either fear or nervous tension.

The conclusion of scientists: if someone assures that a cellular telephony station located near the house affects well-being, most likely this is self-hypnosis. However, the authors of the study emphasize that they cannot say anything about the possible long-term consequences of such a neighborhood.

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