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One of the most characteristic signs of cosmic phenomena is correct repeatability, cyclicity. For example, the rotation of the Earth around its axis and the Sun. But, for astronomers for a long time is not a secret, that the duration of the earthly day is gradually increasing. Then, why are there such Earth's velocity swings? For example, it is estimated...

The Pluto is the most remote and smallest planet in the Solar System, which every 248 years enters the orbit of Neptune for several decades. Thus, at this time it is closer to the Sun than Neptune. The last such period ended in early 1999. The diameter of Pluto is 2300 km. It is less than even the four Galilean satellites of Jupiter, the satellite of Saturn...

With the development of the capabilities of modern astronomy is increasingly a question: Is there the infinite universe? To answer this question, let us take the theory of relativity, where the space and the time are treated as a single entity, the so-called "space - time", in which the time coordinate plays an equally important role that space...

Neutrino astronomy is related to the discovery and study of special nuclear particles - neutrinos. This particle is very small, has a negligible mass and no electric charge. Thanks to its properties of neutrinos can quite freely pass through giant column material. The mean free path of the particles, ie the average distance that it is able to pass into the matter...

The solar system is not only planets, asteroids, comets, it's also interplanetary space, which is far from emptiness! In the cosmos, complex, diverse processes occur at high altitudes, in which the radiation halo of the Earth plays an important role...

What would become of the Earth, if there was no moon? What would have changed? First of all, transparent moonlit nights, silvery paths on the water would disappear... But that's not all. There would be no lunar tides and tides, and therefore changed would be the conditions of navigation...