![]() ![]() The Universe contains billions of galaxies.Earth is a part of our planetary (solar) system. ![]() There is a star in their centers and at least several planets orbiting around main stars. The whole Universe has billions of galaxies! Since the 1990s, scientists discovered numerous planetary systems with the same properties as our Solar system has. We can see its stretch across the sky with naked eyes. Our Solar system is a part of a galaxy called the Milky Way. Other galaxies have elliptical or irregular shapes. There are supermassive black holes in their center of many galaxies.Gravity holds all elements of the Galaxy together.The Galaxy contains an enormous amount of stars, their planetary systems, and space dust. There is something more outstanding - the Universe. However, our Sun is not the one object of astronomy. It is the only star that astronomers can study in detail. Its temperature is 28,080,000° F (15,600,000° C).Įven though we can fit a 1,3 million size Earth in the Sun, scientists name it a yellow dwarf, as it is a medium-sized star.It is the biggest body in our planetary system.Its light reaches Earth for eight minutes.It lives in the center of the planetary system.How does it make so much energy? It transforms the hydrogen in its core into helium and explodes an immense amount of energy or radiation. It is the most significant source of energy and life on our planet. It looks like an egg, and scientists say it has an elliptical form. Our Solar system’s gravity pulls eight planets, dwarf planets, countless comets, asteroids, and various cosmic objects and makes the whole system. Later the astrophysicists discovered the organization of space bodies in the whole system. They orbit around the Sun just like our planet does. They called them planets or Wandering stars. Greek philosophers were the first who have noticed some bright objects that wander around stars. We can see many cosmic bodies, just looking at the sky with our naked eyes: the Sun, the Moon, stars, and planets. How about diving into the mysterious science of astronomy and finding out more astonishing facts? Let’s get it started! What is the Solar system? I am a worthy cosmic body! Just think, eight planets, comets, and asteroids orbit around me! Human puzzle what makes me shine? Here is my secret: I contain helium and hydrogen, producing a lot of energy! That makes my special glow!”. But it is not so, as I am a medium-sized star with a big mass. They think I am the biggest in the Universe. It would probably tell: “I have many fans on Earth, and they see me much closer than other stars. One cosmic conversationĭid you know that the Sun is just a star in the Galaxy consisting of millions of stars? And it is not even the biggest star in the Universe! If we could have a cosmic conversation, the Sun would tell us many interesting things! Essential knowledge about the solar system in thrilling details and breath-taking facts. A kid-friendly guide to the basics of astronomy. ![]()
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