Dr. Hamid Mjool Al Nuaimi *
After the Sun is born from the solar nebula, material, gases, and distant dust collect in the disk, and these masses collide with each other, forming larger and larger bodies, and some grow even larger. Their gravity is enough to form balls around the Sun and become planets of different sizes and masses: massive gas (such as Jupiter, Saturn and Neptune), medium-sized and small rocks (such as Earth, Mars, Venus and Mercury), dwarfs such as Pluto and its The group, and the asteroid belt made up of fragments of the early solar system and many moons orbiting each other according to the mass and size of the planet, cannot coalesce. Forms a planet.
Other small remnants became asteroids, comets, meteors, small irregular moons, as well as dust and gases. Glory be to Almighty God who created the earth in golden color between the hottest and the coldest planets.
The structure of the planets and other celestial bodies in our solar system is due to the way they formed. Closer to the Sun, small rocky planets formed that hold heat and are called terrestrial planets. They are all small and have solid rocky surfaces. The unstable planets in the outer regions of the young Solar System gravitationally clumped together to form the gas giants Jupiter, Saturn, Uranus, and Neptune.
From the foregoing, God Almighty created the sun, so that the family of celestial bodies was associated with it and with it what would be the solar system, the moon, until it returned, we praised it as arrogant, arrogant. The sun never sleeps to feel the valleys, the moon and the night of the night.
The closest planet to the Sun is 57.9 million km away and has an orbital period of 88 days (Mercury). In terms of distance, it is 100 times farther than the first, and takes 248 years to complete its orbit around the Sun (Pluto). Its diameter ranges from 2,500 km to 143,000 km: “Indeed, everything we have created has a measure.” Al-Qamar 49.
Terrestrial planets are solid bodies that do not differ in their density or chemical composition, but they do differ in temperature, gravity, and the natural conditions of their surfaces, such as water and air in the atmosphere. There are some gas clouds on its surface, and some of its inner regions may be very hot, but these regions are surrounded by cold surface layers. As for dwarf planets, they are Pluto and its group, which are small celestial bodies that are different from other planets.
Most of these planets have small satellites called moons. For example, Earth has one moon, Jupiter has 92 moons, Saturn has 83 moons, and Pluto has five moons, so the total number of moons is 229.
From the analysis of this text of modern scientific knowledge, we see the external relationship between the Sun and the various celestial bodies floating in space. That is, directly or indirectly, the concentration in space in a system is a general indication of the total content of the galaxy, which as a whole is moving at an amazing speed:
The visible universe: more than a billion galaxies and nebulae (gas, dust and smoke), as well as dark matter and dark energy.
Galaxies: There are about one billion galaxies in the visible universe, and each galaxy contains an average of about 100 galaxies.
Galaxies: Contains gas and dust between 100 and 150 billion stars. Our galaxy (Milky Way): About a billion stars (some of which are Sun-like stars) in proportion to other galaxies (nebulas, planets, rocks, gas and dust).
Our Solar System: Sun, its planets, moons of planets, asteroids, comets, rocks, gas, dust and smoke.
Of course there are galaxies, stars and other celestial bodies that we don’t notice.
* Director of the University of Sharjah, Chairman of the Arab Union for Astronomy and Space Sciences
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