Essay On Planets In Solar System !!TOP!!
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The origin of the Sun and its orbiting planets has been a point of hypothesis and conjecture ever since man looked upon the stars and planets and wondered about their origins. For the ancient Greek and Roman civilization the celestial bodies they observed in the sky were thought of as Gods and Goddesses, looking down up the Earth from some form of godlike platform. Today, it is an established fact that the heavenly bodies we see in the night sky are composed of planets and stars, celestial bodies of rock, gas and varying forms of elements that were formed billions of years ago. Even though such objects have been observed for hundreds of years it is only within the last 200 that humanity has begun to understand their unique qualities. While there have been conjectures, varying hypothesis and age old established theories what must be understood is that as the science of astronomy evolves humanity begins to slowly adapt to new information, new discoveries and subsequent re-evaluations of what we knew of as fact. For example, early studies of astronomy adopted the geocentric model in that they believed that the sun, planets, moon and stars revolved around the Earth, not only that there was also the belief that the Earth was in fact flat (Copernicus, 2009: 83). It is based on this that when examining the established theories on the origins of the solar system one must do so with both an open yet skeptical mind, taking into account the given data and observations yet not clearly adhering to any one theory as being definitive proof.
Another interesting topic that should be taken note of is the origin of the Earth itself for just as there have been numerous theories as to the origin of the solar system there have been a plethora of theories which have attempted to determine the origin of the Earth itself. Our home planet is unique in that it is the only planet within our solar system that has sufficiently developed to be able to support life. While there have been varying accounts of how life came to be on Earth, with religion and science vying for attention, the fact remains that the uniqueness of our planet should not be underestimated and as such bodes a certain degree of curiosity as to the origins of the unique circumstances that enabled Earth to become what it is today. It is based on the various questions presented that this paper will explore the origins of the solar system and of Earth itself in order to attain a clear picture of where it came from and what its possible end could be.
In relation to the explanation of the origins of the molecular cloud as coming from the debris from Super Massive stars Courtland (2010) presents a new theory that details exactly how the molecular cloud that spawned the solar system came to be. In her study which involved the examination of various meteorites she discovered that sealed within the rock were calcium-aluminum rich incisions (Al-26) that could only have been formed by stars that were at least 10 times as massive as the sun (Courtland, 2010: 8). Due to the fact that Super Massive stars usually form within clusters with Al 26 usually decaying rapidly due to the intense heat within such clusters it is hypothesized by Courtland (2010) that a run away must have been tossed out of its orbit as a direct result of either an explosion of a nearby Super Massive star or due to combined gravitational push by its sibling stars within the cluster (Courtland, 2010: 8). Due to Super Massive stars having a relatively short life cycle when the star became a supernova the dispersed molecules and elements became the molecular cloud that we know of today as being the primary basis of the nebular hypothesis.
Since this paper has now established the various theories which attempt to explain the origins of the molecular cloud that brought about the creation of the solar it is now necessary to explain the current prevailing theory on how the planets and the creation of the sun came about. As mentioned earlier, in the section detailing the nebular theory, it was explained that as a direct result of a gravitational collapse of a section of the molecular cloud this precipitated the creation of the solar system (Boeyens, 2009: 493-499). A better explanation of this would be that as section of the nebula collapsed this produced a certain degree of angular momentum wherein the nebula actually began to spin faster as it collapsed in on itself. This spinning combined within the collapse produced a great deal of kinetic energy within the core of the molecular cloud until the result was a contraction of the center of the molecular cloud, which had now become a disc shaped object, into what is known as a proto-star, namely a star that has yet to have hydrogen fusion occur at its core (Boeyens, 2009: 493-499). Within 50 million years the internal temperature and pressure of the core itself was able to build to sufficient levels resulting in the start of hydrogen fusion marking the entry of the sun into its life as a main sequence star (Boeyens, 2009: 493-499)
By the end of this paper it has become apparent that the process of creation of our solar system and even of our planet has been an accumulation of fortunate incidents that culminated in humanity evolving into its present state. When examining the theories explaining the creation of the molecular cloud, how Courtland (2010) presented the notion that the molecular cloud our present system came from originated from a rogue Super Massive star that coincidentally was shot out of its group by gravitational forces, that it was able to travel far enough to an area ideal enough for uninterrupted growth, that the creation of our planet was in the right place, at the right time with readily available water literally crashing into the planet in order to support life; a combination of all of these completely coincidental factors almost leads one to believe that the creation of humanity itself was no accident but on purpose. On the other hand there are quite literally billions upon billions of solar systems within the universe and it might actually be the case that the process that created the Earth is not so coincidental and that somewhere out there life similarly exists on thousands of planetary systems with the exact same composition as that of humanity yet far away enough that we cannot see the similarities at the present.
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The universe is everything that does exist including the Sun, Moon, all the stars, planets, meteoroids, stardust, small particles, and everything that exists in free space. No one can determine how big the universe is. It is assumed to be of infinite space and is still in the process of expanding or we can say becoming larger and larger. It is said to be 13-14 billion years old.
The term galaxy is given to a gigantic collection of millions and billions of stars along with their solar systems, different gases, and dust, all held together by the force of gravity. The galaxy to which we belong is called the Milky Way Galaxy. All the stars we see during the night belong to our Milky Way Galaxy. There are an estimated 100- 200 billion galaxies in the universe.
A star has some gravity associated with it, which makes it attract a few planets, dust, and small objects that revolve around it. The star with the objects revolving around it makes a solar system. In simple words, a solar system can be defined as a collection of planets, their moons, a few asteroids, comets, dust, and gas that orbit a central star. Our solar system has the Sun as the central star and our planet Earth along with other planets (8 in total) revolves around the sun because of its gravity. Let us read more about our solar system.
As we have discussed earlier that our solar system consists of the sun and its eight planets, so the name of these planets in the ascending order of distance from the sun are Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, and Neptune. The planets which are nearer to the sun are comparatively smaller than those which are far away. We should discuss these planets in brief.
It is the second closest to the Sun and is the hottest planet in our solar system. Venus was also named as the morning star and the evening star and derives its original name from the Roman Goddess of Love. The average temperature on Venus is 880F. There are a lot of huge volcanoes and rivers of lava that flow across the planet. Its surface is almost entirely covered with clouds and is hard and rocky consisting of mountains and valleys.
It is the sixth planet from the sun and is named after the Roman God of Architecture. Saturn is also a gas giant like Jupiter and is made of Hydrogen and Helium. It has a set of rings made of pieces of ice and rocks. Its atmosphere is thick. It is the second largest planet in our solar system. And it has the lowest density of all planets. Scientists say that Saturn is lighter than water and if placed in water, the planet will float. It is also nicknamed the ringed planet.
It is an ice giant. Water, ammonia fluids, and methane contribute to the making of Uranus. It has a thick atmosphere made of hydrogen, helium, and methane. Methane makes the planet look blue. It has the coldest atmosphere of all planets in the solar system. It has faint rings.
Now we have good knowledge about our solar system and we are aware of the fact that Earth is the only planet sustaining life. So, it becomes our duty to save our planet from all possible disasters and carry forward the existence of life in our solar system. 153554b96e
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