The universe


May 20, 2022

The universe, cosmos, universe or universe is the infinite space that surrounds us. We call space-time space, which consists of bright galaxies (containing many stars and other celestial bodies) scattered in dark intergalactic (and interstellar), conditionally, "empty" space-time called vacuum. It is an overall space-time in which many material celestial bodies float, such as: stars, planets, satellites, planetoids, comets, meteors, black holes and neutron stars. However, most of the matter and energy is most likely in the form of so-called dark matter and dark energy. The stars are the most visible celestial bodies in the universe and are composed of glowing plasma. Next to the nearest stars of the Sun, naked people can see from about 6,000 to about 10,000 stars. It is possible to observe light from hundreds of billions of stars with a telescope. The distances between the stars are huge and are measured in light years (SG). A light year is a journey of about 9.46 trillion kilometers that crosses light in a year, moving at a speed of 299,792,458 m / s in airless space. The Sun is the closest star to the Earth, located at a distance of 149,600,000 km or 8.3 light minutes (cm). Apart from the Sun, it is closest to Proxima Centauri (Proxima Centauri or Alpha Centauri C) which is about 4.3 SG away. The stars differ in size, color and brightness. The brightest star in the constellation Orion is Betelgeuse (Alpha Orionis), and Antares (Alpha Scorpii) is in the constellation Scorpio. Star clusters are seen in the sky that fascinate us with their appearance and are called constellations or constellations. There are 88 of them, and the most famous are: Big and Little Bear, Scorpio, Sagittarius and others. However, stars naturally group into larger star clusters known as star clusters or clusters. Several such star clusters form a galaxy, and galaxies again form a galactic cluster or metagalaxy within space. Our galaxy is called the Milky Way or simply the Galaxy, and it is spiral in shape. The sun is on the very edge of one of its arms, along with several other nearby stars. The closest galaxies to ours are the Large and Small Magellanic Clouds, which are its natural companions. The Large Magellanic Cloud is 179,000 distant, and the Small Magellanic Cloud 210,000 SG. In addition to the mentioned celestial bodies and star systems in space