WRITE AN ESSAY ON 'PLANETS' OR 'TREES' OR 'NATURE'
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Answer:
Our solar system consists of eight planets that revolve around the Sun, which is central to our solar system. These planets have broadly been classified into two categories that are inner planets and outer planets. Mercury, Venus, Earth, and Mars are called inner planets. The inner planets are closer to the Sun and they are smaller in size as compared to the outer planets. These are also referred to as the Terrestrial planets. And the other four Jupiter, Saturn, Uranus, and Neptune are termed as the outer planets. These four are massive in size and are often referred to as Giant planets.
Answer:
The universe consists of more than 500 solar systems as of now or as of our limited knowledge on the universe. Our solar system is present inside the Milkyway galaxy. The Milkyway galaxy is called so because the Romans named it as they found the earth’s skyline at night to resemble that of a band and a patch of milk. The solar system is the most important part of our Milkyway galaxy. According to experts and astronomers, the solar system is the only planetary body in the universe that supports life. And earth, a part of the solar system, is the only planet that supports life in the universe. But this can easily be false since man has not discovered all the aspects of our universe.
Solar systems consist of eight planets, which are Mercury, Venus, Mars, Earth, Jupiter, Saturn, Uranus and Neptune. Pluto was also a planet but it was derecognized a few years ago because of its size. The main criteria for being a planet are it should orbit around the sun, it should have sufficient mass to assume hydrostatic equilibrium and it should have a clearly defined neighborhood around its orbit. Pluto failed in the second criterion. But Pluto is known as a dwarf planet. All these decisions of naming, recognizing and derecognizing of planetary objects are taken by the International Astronomical Union (IAU). Basically, IAU is an international body that consists of astronomers and scientists all across the world with the main objective and goal of promoting and safeguarding the astronomical sciences in every sphere, through collective international cooperation.
Each planet present in the solar systems revolves around the sun inside their own orbits at their own speed. This is an essential criterion to be declared as a planet in the solar system.
Each of the planets that we mentioned has its own characteristics, which is given below
Characteristics of the Planets in the Solar System
Mercury: Mercury also knows as the swift planet, is the smallest, hottest and the closet planet to the sun in the solar system. The temperature on Mercury can go as high as 450-degree Celcius on normal days but the nights are freezing cold. Mercury completes one revolution in 88 earth days. With a diameter of 4878 kilometers and a distance of 35 million miles from the sun, mercury is the fastest planet in the solar system
Venus: Venus also called as a morning star, is the second closet planet to the sun in the solar system. With a distance of 67 million miles from the sun, Venus completes one complete revolution around the sun in 255 earth days. It is also known as the hottest planet in the solar system. On bright days, Venus is visible through the naked eye because it also one of the brightest planets
Earth: The third planet in the solar system is the only known planet in the whole universe which can sustain life. Nicknamed as the blue planet, Earth completes one revolution around the sun in 365 earth days and is at a distance of 93 million miles from the sun. With a diameter of 12760 kilometres, the earth is covered with two-thirds of water on its surface. The presence of water and oxygen is what makes earth sustain life.
Mars: Also known as the red planet is the fourth planet from the sun. It is called a red planet because of the presence of iron oxide on the Martian surface which gives it the red tinge. With a distance of 142 million miles from the sun, Mars completes one full revolution around the sun in 687 earth days. It is considered to be a cold planet and has certain physical and geographical features that are similar to the earth. It is most likely to be the next home for human beings after the Earth
Jupiter: Nick-named as the giant planet of the solar system is fourth in line from the Sun and is the biggest known planet soo far. With a huge diameter of 139,822 kilometers and a distance of 484 million miles from the sun, Jupiter takes almost 4333 earth days to complete one revolution around the sun. Jupiter is known to have 79 natural satellites revolving around it. It also has great red spots and cloud bands surrounding the planet.
Saturn: Known as the ringed planet, because of the numerous rings around it, which are made up of ice particles. Saturn is at a distance of 887 million miles from the sun and takes 10,759 earth days to complete one complete revolution around the sun. It has 62 natural satellites composed of ice
Uranus: Uranus is the second largest planet with a diameter of 51,120 kilometers and takes 30,687 earth days to complete one revolution. It is also the coldest planet in the solar system
Neptune: The last planet in the line is Neptune also called a big blue planet. It is 2.8 billion miles away from the sun and takes 60,190 earth days to complete one revolution.