Uranus and Neptune
Uranus is the seventh planet from the Sun in the solar system. In diameter, it is almost four times larger than the Earth. Very far from the Sun and relatively…

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Ptolemy's system.
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,…

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Universe
More than anything else - the Universe itself, covering and including all planets, stars, galaxies, clusters, superclusters and cells. The range of modern telescopes reaches several billion light years. Planets,…

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extinguishing

The first models of the world.

Despite the high level of astronomical information of the peoples of the ancient East, their views on the structure of the world were limited to direct visual sensations. Therefore, in Babylon, views have developed that the Earth has the appearance of a convex island surrounded by the ocean. Inside the Earth, as if there is a “kingdom of the dead.” The sky is a solid dome resting on the earth’s surface and separating the “lower waters” (the ocean flowing around the earth’s island) from the “upper” (rain) waters. Celestial bodies are attached to this dome, as if gods live above the sky. The sun rises in the morning, leaving the eastern gate, and sets through the western gate, and at night it moves underground.
According to the ideas of the ancient Egyptians, the Universe looks like a large valley, stretched from north to south, in the center of it is Egypt. The sky was likened to a large iron roof, which is supported on pillars, on it in Continue reading

Inflationary universe
In addition to the question of the origin of the universe, modern cosmologists face a number of other problems. So that the standard theory of the big bang could predict…

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Radiation of the sun
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…

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Is a black hole already found?
Scientists strongly believe that black holes really exist. Albert Einstein's general theory of relativity predicted the existence of such objects back in 1917, and over the past decades, astronomers have…

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Moon relief
Traditionally, two main types of landscape — continents and the sea — stand out on the moon. The prevailing shape of the relief of the lunar surface is the lunar…

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