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Where is the Milky Way? If you think that the Milky Way is located at some distance from the Sun and the Earth, you are wrong. The sun and the Earth are part of the Milky Way! But the galactic center (the center of the galaxy) is located at a distance of about 25 thousand light-years from Earth...

Our galaxy is a spiral galaxy the Milky Way. Our galaxy contains billions of stars in the shape of a pancake (the galactic disk), which has spiral sleeves (or branches). The shape of the sleeve can be compared with the water jets emitted from the rotating system for watering lawns. They have a lot of bright, young, blue stars and gas clouds...

About 14 billion years ago the universe did not exist. And then, for a tiny fraction of a second there was a big bang, and there was all the matter and energy of the cosmos. The Big Bang was not like fireworks; It was the rapid expansion of space itself. During the first 10³⁶ part of a second universe increased by more than 10³⁶ times...

In the last century astronomers found indications that at least 90% by weight of the universe does not emit light. It is dark matter. It is considered to be the gravitational glue that makes the stars of galaxies scatter in different directions. Perhaps dark matter determines the fate of the universe...

Antiparticles were predicted in 1929 by the British physicist Paul Dirac, who managed to unite the theory of quantum mechanics, electromagnetism, and relativity. He received in 1928 quantum relativistic equation of motion of the electron (the Dirac equation) with the need to contain solutions with negative energies...

No astronomical term is misused so often as the word meteor. It is often misused even scientists, while it would be better to say – meteoroid or meteorite. What is the difference? Meteoroid is small solid space object, usually a piece of an asteroid or comet moving in its orbit around the sun. Some (very few) meteoroids are actually fragments of Mars and the Moon...