Solar system – 8 planets and over 63 of the satellite, which are opened more often, several dozen comets and many asteroids. All cosmic bodies move in their precise directional trajectories around the Sun, which is 1000 times harder than any body in the solar system combined. The center of the solar system is the Sun – the star around which orbits the turning of the planet. They do not emit heat and not light, but only reflect the light of the Sun. In the solar system now officially recognized as the 8 planets. Briefly, in order of distance from the sun, we list them all. And now a few definitions.
A planet is a celestial body that must satisfy four conditions:
1. the body must revolve around the star (for example, around the Sun);
2. the body must have sufficient gravity to have a spherical or similar shape;
3. the body should not be near its orbit of other large bodies; Continue reading
Now we prove the existence of 1783 planets in 1105 planetary systems. And the number of candidates is approaching three thousand. All in all, scientists assume that in our galaxy the milky Way is at least 100 billion exoplanets!
People have long realized that other stars, like the Sun, can have their own planet. And even gave them the name exoplanets or extrasolar planets, i.e. planets outside our Solar system. But to verify the existence of such planets a science was only in the late 1980s. Now it is proved the existence of 1783 planets in 1105 planetary systems. And the number of candidates is approaching three thousand. All in all, scientists assume that in our galaxy the milky Way is at least 100 billion exoplanets. 5-20 billion of them earth-like. Some of the most remarkable exoplanets.
Minitems, that is, exoplanets, which are less in size small even our Earth, Kepler-42 d (also known as KOI-961 d) revolves around the star Kepler-42 in the constellation Cygnus. The radius of the planet is just 0,57 ± 0,18 from the earth’s mass and less than 90 % of the mass of our planet. One year, one revolution around its star, Kepler-42 d lasts for less than 2 earth days. Continue reading
The universe (cosmos) is a whole world around us, limitless in time and space and infinitely diverse in forms, which takes forever moving matter. The eternity of the Universe in part you can imagine on a clear night with billions of different size luminous shimmering dots in the sky, representing the distant worlds. Rays of light at a speed of 300 000 km/s from the most remote parts of the Universe reach the Earth about 10 billion years.
According to scientists, the universe resulting from Big Bang 17 billion years ago.
It consists of clusters of stars, planets, cosmic dust and other cosmic bodies. These bodies form a system of planets with satellites (for example. Solar system), galaxies, Metagalaxy (accumulation of galaxies).
Galaxy (postdegree. galaktikos – milk, milky, from the Greek gala – milk) — a vast stellar system that consists of many stars, star clusters and associations, gaseous and dust nebulae, as well as individual atoms and particles scattered in space. Continue reading