The movement of the Sun

Published April 02, 2017

The movement of the Sun

Is there a movement of the sun? Many amateur astronomers have learned well the heliocentric system of the world and rightly say that all of the planets and the Earth revolve around the Sun, but at the same time do the following, already an invalid, a logical step, as if its movement while absent...

The temperature of stars

Published April 02, 2017

The temperature of stars

When we talk about the temperatures of stars, it is meant that the surface temperature of stars, which can be measured. The surface temperature of the star is a black body temperature, which has the luminosity of the star. Increasing the temperature of the star to the center can only be obtained by calculation...

The constellation of the Great Bear

Published April 02, 2017

The constellation of the Great Bear

The seven bright stars of the northern sky, which we now know as the constellation of the Great Bear, have always attracted the attention of all human civilizations. In all periods of history the Great Bear was located near the north pole of the world, and its stars are not touching. In all civilizations, they also merged into one constellation, although under different names...

The death of the star

Published April 02, 2017

The death of the star

The star birth occurs during compression of gas and dust clouds, at sufficiently high compression ratio when heating in the center of the star is sufficient to "ignition" fusion reactions. The death of the star occurs when the star ceases to be in a stable condition under normal parameters (density, size, somehow comparable to the sun). In this sense, the death of a star comes in different ways, depending on its initial mass...

Dimension of stars

Published April 02, 2017

Dimension of stars

Measuring the dimension of stars is a difficult task. Just calculate the diameter of the sun is relatively simple, but all the other stars, even in large telescopes are visible as points. Despite this, scientists have found a way to measure the dimension of stars. This can be done, for example, by measuring the time of passage of a dark companion in a darkened variable star in front of a bright component and knowing the orbital velocity of the satellite...

Comets

Published April 02, 2017

Comets

In ancient times, the appearance of a bright comet in the sky plunged people fear. Ignorance of the phenomena of nature made them in the eyes of people harbinger of terrible events such as war and epidemics. The appearance of a comet seems only a rare event, as most of them are visible only in the medium and large telescopes...

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