The astronomers have discovered more than 2500 other stars with planets orbiting them in our galaxy. But our “solar system” is the one that is officially known. Throughout this article, we will accompany you to know more about this wonderful system.
Have you asked yourself why it is named as a solar system? The answer is that because our Sun is named Sol, after the Latin word for Sun then everything is related to the sun is called “solar”. Besides, our planetary system is located in an outer spiral arm of the Milky Way galaxy. It is called Milky Way as it appears as a band of light in the sky when you see it in a really dark area.
The sun is the center of our solar system. It supplies the earth with light and heat. As well as bounding the objects (planets, asteroids, moons …etc.) by the gravitational force which are different in sizes, some are small and others are large. The main objects in the solar system are the eight planets, each of which circles the Sun in its own orbit. Our wonderful Earth is the third planet out from the Sun.
Each planet has the moon that orbits around it. Therefore, our planet has its moon that revolves around it once per month. The fact is that moon size relates to its larger appearance in the sky not relates to its size. Although it has a large size in relation to other objects, moon appears big because, it is very close; the Moon is just 384 thousand km away. By comparison, the Sun is 150 million km away.
Day and night phenomenon is related to the movement of the earth around the sun. At given time, half of the Earth is lightened by the Sun in which people can see the Sun, and this is the dayside, while the other half of the Earth obtains no direct light from the Sun and hence is in darkness.
Our beautiful Earth has all reasons for life. Living organisms are really lucky to have appropriate conditions of temperature, humidity, pressure water…etc. that guarantee their good life rather than any other planet of our solar system.