The radio emission of the Sun has two components – constant and variable. During strong solar flares, the radio emission of the Sun increases by a factor of thousands or even millions of times compared with the radio emission of a calm Sun. X-rays come mainly from the upper atmosphere and the corona. Emission is especially strong during years of maximum solar activity. The sun emits not only light, heat and all other types of electromagnetic radiation. It is also a source of a constant stream of particles – corpuscles. Neutrinos, electrons, protons, alpha particles, as well as heavier atomic nuclei make up the corpuscular radiation of the Sun. A significant part of this radiation is a more or less continuous outflow of plasma – the solar wind, which is a continuation of the outer layers of the solar atmosphere – the solar corona. Against the background of this constantly blowing plasma wind, individual regions on the Sun are sources of more directed, amplified, so- Continue reading
The formation of astronomy as an exact science began thanks to the work of the outstanding Greek scientist Hipparchus. He first began systematic astronomical observations and their comprehensive mathematical analysis, laid the foundations for spherical astronomy and trigonometry, developed the theory of the motion of the Sun and the Moon, and on its basis – methods for predicting eclipses.
Hipparchus discovered that the apparent movement of the sun and moon in the sky is uneven. Therefore, he came to the point of view that these luminaries move uniformly in circular orbits, but the center of the circle is shifted relative to the center of the Earth. Such orbits were called eccentrics. Hipparchus compiled tables by which it was possible to determine the position of the sun and moon in the sky on any day of the year. As for the planets, according to Ptolemy, he “made no other attempt to explain the motion of the planets, but was content to tidy up the observations made before him, adding to them even more of his own. He limited himself to pointing out to his Continue reading
In the solar system there are many different types of free celestial bodies that do not have their own orbits. Such bodies can be asteroids, meteorites, comets, as well as free moons that do not belong to the solar system. In Space, there is also enough “garbage” – debris destroyed by a collision or explosion of celestial bodies. It has long been known that meteorites and other celestial bodies often fall on Earth, moons, and other planets. The earth and other planets are well protected from such “bombing” with their atmosphere, in which most of the small falling objects burn up. But the moons that do not have an atmosphere are literally dotted with impact craters. For example, the satellite of Saturn Mimas in the photo on the left, taken by Cassini in 2005, almost all is covered with craters from the smallest to the gigantic. The sun is not only an exception, but, on the contrary, due to its gigantic attraction, it is thousands of times more likely to undergo such Continue reading