Eight Planets-Solar System Tour

Planets are meant to mean astronomical objects in the universe that have the capacity to contain spherical forms only due to their gravitational force, whose mass is not sufficient for the heat-nuclear reaction to produce energy like the sun, and that removes all the small objects in its surroundings or its own Has taken over. Generally, the planets revolve around some or other sidereal debris, but many have expressed their likelihood of exception.The planet's English synonyms are rooted in ancient times, which have many historians, scientists, , Mythological and religious matters In many cultures of ancient times, the planets were considered to be heavenly or deities of gods. With the increase in the knowledge of human knowledge, this concept has also changed. We now know that they are nothing but astrological objects. In 2006, the International Astronomical Union determined a clear definition of the planets of the solar system through a formal decision. According to this modern definition, only 8 of the planets discovered before 1950 were kept in the status of the planet. But some things like Ceres, Pulas, Juno, Busta and Pluto, some of whom were previously called by many scientists, were all dropped from the planets list.

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Greek astronomer Ptolemy believed that the planets rotated around the globe with some variables and epicycles. This concept is proposed several times before the planets that are rotating the sun, but it is proven for the first time in the seventeenth century by observing Galileo Galilei's telescope. By analyzing the observed data, German astronomer Johannes Kepler concluded that the orbits of the planets were not round, but rather elliptical. As the astronomers' observation machine improves on day-to-day, it is gradually known that the other planets are rotating the axis a bit and many of them have polar ice and seasonal changes just like the Earth. Some recent studies have said that other caves have earthquakes, hurricanes, plate tectonics and even water.

The planets are divided into two main categories: large low-density gaseous monsters and rocky terrestrial planets. The number of planets in the solar system is eight. The first four planets are landscaped, ie, Mercury, Venus, Earth, and Mars, when the sun goes outwards. After that four giant monsters: Jupiter, Saturn, Uranus and Neptune Of these six planets have one or more satellites. In addition to the IAU definition, there are 6 dwarf planets, and many other dwarf planets are waiting to be listed, and there are thousands of small solar world objects.

Since 1992 many planets have been discovered around other stars in the galaxy, which are called extrovert. The total number of extrapolation discovered by May 22, 2013 is 889, the total number of planets in the world is 694, and the total number of planets in the total number is 133.Their size and mass may be much higher than in Earth, from Jupiter to much more. On December 20, 2011, the Kepler space telescope announced the discovery of equal size extrinsic world, Kepler 20e and Kepler 20f. They are rotating around the Kepler 20 star.A 2012 study has suggested that there may be at least 1.6 planets around each galaxy, and there may be many lonely planets that do not rotate a star.Scientists of the Harvard-Smithsonian Center for Astrophysicists in January announced that the size of the galaxy is comparable to the Earth There is a possibility of at least 17 billion expansions that can be transmitted to their stars 85 days or less.

The Mercury:Mercury is the first and smallest planet in the Solar System. It is the closest planet in the sun. There is no satellite. It circumscribed the sun every 88 days a day. The brightness of its brightness ranges from -6.6 to +5.7 [13] [14]. But it is not easily seen from the planet, because its largest angular difference with the Sun is only 28.3 degrees. It is visible only in the dark light of morning and evening. The amount of information collected about Mercury is comparatively less than that. Mercury-led Navy was conducting an investigative operation in 10, 1974 - 1975, and Messengers conducted investigative operations for 4,000 times in 2004-2005.

In terms of physical properties, Mercury is like a moon, because the moon has a lot of shadow on it. The planet has no stable atmosphere, nor does it have any natural satellites. It has a large iron core. The magnetic field produced by this center is 0.1% stronger than the Earth's magnetic field. Mercury's surface temperature ranges from 90 to 700 kelvin. The hottest place is the half-point point and the low point of the bases near the poles of the coldest place.
The Romans named this planet after the name of their swift messenger god Mercury. In Mercury, Mercury (Mercury) is Jupiter (Jupiter) and Maya's son. In the twilight, Mercury is seen moving very fast in the sky. Perhaps this is why this kind of name has been named. The image of the astronomical symbol of Mercury on top of the attached document on this page actually carries the meaning of the deity's head and its cap. It is one of the oldest astrological classical symbols in the world. The Greeks called Mercury to St??ß??, or "Stebblin", which means the deity. Another name in Greece was "Hermione" or "Hermes". Prior to the fifth century BC, astronomers considered Mercury as a combination of two separate objects, which were only seen during sunrise and only during sunset. Mercury's name is derived from the Sanskrit name used in India in the name of the Bengali name Mercury. Its name in India was Mercury (Mercury). Mercury is the name of the son of Chandra. In Chinese, Korean, Japanese and Vietnamese cultures, it is called "water star
which is based on the philosophy of the five fundamental materials formed by the world. In Hebrew, its name is Kokhwa khama as well as the hectic objects. Here the hot objects are meant to mean sun.
Interior structure

Mercury is one of the four earthly planets, that is, it also has a solid background like the Earth. Its size is the smallest among four earthly planets; Its diameter in the equatorial region is 4879 km. Mercury's structural components comprise 70% metallic and the remaining 30% silicate. Its density is the second highest, density of solar material matter, 5.43 g / cm³; Little less than the world. Mercury's structural components were more concentrated if able to completely detect the effects of gravitational contraction.
Large center of Mercury

Its concentration can play a significant role in understanding the internal structure of Mercury. The main cause of high density of the Earth is gravitational contraction, which is the highest in the center. Mercury is very small and its center is not as strong and narrow as the Earth. Where the center of the Earth is only 17%.

The mantle covers 600 km of area around the center. According to the information found in the history of Mercury, it is now generally thought that, a long time ago, Mercury's collision with a kilometer diameter object collided. In this conflict, some parts of Mercury's Mantel fall apart. That is why the thickness of mantle is so low compared to the center. [19] However there are other views about this. Under the assumption that Mercury's thickness is 100-100 km in diameter. Its surface features a lot of narrow ridge, some of which stretch for several hundred kilometers. They are believed to have been formed as Mercury's center and mantle, but before they become cool and compressed, the intensity of Mercury becomes difficult. That is why they remain as a ridge. [20]

Mercury has more iron than any other large planet in our solar system. Several theories have been proposed to explain this high volume of metals in Mercury. The most accepted theory is that the proportion of metals-silicate on Mercury was equal to the ratio of the normal condomite meteor, and once its mass was 2.25 times the mass. From the history of the solar system it is known that at one stage a large planetesimal was hit by Mercury, whose mass was about one-sixth of its mass.

The Venus:The second planet in the solar system, from Venus or the distance from Zohra Sun, is the second planet in the solar system. This earthly planet is sometimes termed as the "sister planet" of the Earth, because there is a great deal of similarity between structural elements and conduct in the Earth and Venus. When this planet emerges in the sky in the morning, it is also called Lucifer or Satan. It is said in the morning sky in Bengal and it is called evening in the evening sky. There is no satellite.
Although the orbit of all the planets is elliptical, the orbital sphere is round. Its eccentricity is less than one percent. Since the distance from the Sun to Venus is less than the Earth, the Sun arises from the Earth's side (47.8 degrees in the Sun), which is almost equal to Venus. That's why this planet is seen only a few hours before sunrise and hours after sunset. However, when Venus is in its bright state it can be seen even during the day. In fact, Venus is the only astrologer without the moon, which can be seen from both the night sky and the day sky. However, some nights are seen both at night and day. For example, Crab Nebula creates new nets. However, in the dark sky, the Venus visible in the sky is very much like the stars shining.

The interval between the two highest consecutive quarters is 584 days. After this 584 days, Venus was seen to be in position at the position of 72 degrees with the position that was previously seen. Since 5 × 584 = 290 = 8 * 365, it turns out that Venus is returning to its previous position after 8 years (except for two days of leap year). This cycle was known in ancient Greek civilization as Sothiks Chakra and it was well-known to the Maya civilization. It also has a relation with the moon, such as: 29.5 * 99 = 290.5; That is, this period is equivalent to about 99 moonthouses.

During the interconnection of the planet, Venus comes closer to the Earth than any other planet; From then on, the distance of the earth is about 100 times the average distance of the Earth from the moon. Since 1800, Venus has reached the lowest of the Earth on December 16, 1850. When the distance between them was: 0.26413854 Astronomy Unit = 39,541,827 kilometers Until December 16, 2101, it will be the lowest distance of the Earth from Venus. On the said date, distance between the planets will be 0. 0.26431736 astronomy unit = 39,541,578 kilometers.

The Earth:Third, according to distance from the Sun, is the third highest concentration of the planet and the fifth largest planet in eight solar systems. It is one of the four solid planets in the Solar System. The world's other name is "World" or "Nilgah". The Greek name known as "Earth", known in English as Gaia (Ga?a) [n 5], is the Latin name of the planet "Terra". [24]

The world is home to millions of species of people, including humans. The world is the only cosmic place where the existence of life is revealed. [25] Earth was formed 454 billion years ago. Within a billion years, life on earth arises. [26] Earth's biosphere has brought significant changes in the atmosphere and other inorganic conditions of this planet. This resulted in the increase of the aerobic organisms on the one hand, on the other hand the level of weight was formed. Together with the magnetic field of the Earth, this weight level has widened the way in which the life cycle of life has been expanded by blocking harmful solar radiation. [27] Earth's natural resources and its geological history and orbits have helped in the survival of life in this age. It is believed that more than 50 billion years of life will be in the condition of life.

The Mars:Mars is the fourth planet in the solar system. Because of its red appearance on the earth, its name is red planet. Mars is the last earthly planet in the solar system. That is, it also has the earth like earth. It has a very thin atmosphere, its surface has numerous moons like moons, and Earth's volcanoes, deserts and polar ice. The largest mountain in the solar system is located on this planet. Its name is Olympus Mons. The largest deep canyon is also known on this planet, Wallis Marinaris. Mars rotation period and season change are much like the Earth.

In 1965, the Mariner 4 spacecraft went to Mars for the first time. Since this operation, many have been convinced that there is no liquid water in Mars. The idea is to observe the periodic changes between the light and darkness waves found from Mars. In particular, this type of change is seen from the pole region of Mars, which many have accepted as proof of ocean or water.
Physical properties
Comparison of the size of earthly planets (left to right): Mercury, Venus, Earth and Mars

Mars radius is half of the Earth and one tenth of Earth mass. Its density is less than the Earth's surface and the area's surface is slightly less than the total area of ​​the Earth's dry land. Although Mars is larger than Mercury, Mercury concentration is more than Mars. As a result, the gravitational force of Mercury's surface is relatively high. Looks like a red orange or red orange on Mars. Because of the presence of abundant iron (3) oxides on Mars surface This compound is commonly called rust.

The Jupiter:Jupiter is the fifth planet in the solar system and the largest planet in the solar system. Without Jupiter, the combined mass of all the other planets in the solar system would be more than two and a half times greater than that of Jupiter. Three more planets including Jupiter, Saturn, Uranus and Neptune are called gas monsters together. The other popular name for this four is Jovian Planet. The word Jovian is the adjective of Jupiter. Zeus is used as the Greek synonym for Zeus. Know this from Zeus - the origin has originated. The Jupiter or the Jupiter related words are formed by this root. For example: Zenographer. Expecting Jupiter's value is available 2.8. It is the third bright light visible in the sky in the Earth's sky. More than just the moon and Venus's brightness. However, in some points of the orbit, Mars's brightness is more than Jupiter. From the earliest times the planet was known to astronomers and astrologers. Various myths and religious beliefs of different cultures have been revolving around Jupiter. The Romans named the planet in the name of the mythical character Jupiter. Jupiter is the main god of Roman mythology. This name comes from pre-Indo-European vocabulary, which means the father of the sky.

The primary component of the planet Jupiter is hydrogen and a little amount of helium. It may also have a center made up of heavier elements. Because of its rapid rotation, its shape has been shaped like orbital sphere, with a significant amount of small but eye-catching parts near the equator. The outer atmosphere is divided into several bands in different latitudes which are easily visible. Because of this, there is a storm and stormy atmosphere on the other side of a band with a band. One of the major consequences of such an environment is the great red spot. It is basically a very powerful storm that is continuing continuously from the seventeenth century. The planet is surrounded by a weak planetary force and strong magnetosphere. There are also at least 63 satellites, of whom four satellites are large size. These four are called the Galilean satellites. Because in 1610 Galileo first discovered these four satellites. Ganymede, the largest satellite, is more than Mercury. Space operations were sent for Jupiter research at different times. Pioneer and Voyager have been flying beside the spaceships of the program. The Galileo Orbiter was then sent. Lastly, the name of the mission was called New Horizons, which originally started for Pluto. It was near Jupiter in February 2007. Later, plans to send an operation to Europa satellite was being planned.

The Saturn:Saturn is the sixth planet in the solar system. Its location after Jupiter. It is the second largest planet in the Solar System. Its position is sixth from the sun. This planet has been named after the name of Hindu mythological god Shani. Its English name is Saturn. Roman god Saturn (Saturn) after the name of the English Saturn has been adopted. Its diameter in the equatorial area is 12080 kilometers Its average distance from the Sun is 147.20 million kilometers. Pole area diameter 109000 Its density is 0.68 times the water. The solar year is 29.46 years of world life. It takes time to rotate on its axis 10 hours 39 minutes 24 seconds. The center of this planet contains rocky materials. Most of the medial and surfaces are made of hydrogen and helium. With it the Borac and the coconut water, it is astonishing that there is a stupid Mamuli Nayek's head shine, methane and ammonia. And this planet is surrounded by wide balls. This ball starts from above the Meghshi, which extends up to 7,000 kilometers of Saturn's surface and stretches it up to 74,000 kilometers. There are spaces for different measurements inside this tunnel. In the case of this empty space, its balls have been identified by several names. These shares are - D, C, B, A, F, G, E. The largest spacing of the name is Cassini Division. Its expanse is approximately 120,600 kilometers. On the other hand, the distance between A and B balls is about 4800 kilometers.

Saturn's ring

Saturn's planet is in the beauty of beauty compared to other planets in the solar system because of its attractive force, which has created an astronomical picture in cosmic canvas. In July 1610, astronomer Galileo Galilei first observed the planet Satellites through the telescope and saw its spectacular ring. NASA scientists have discovered a huge new ring (ring) circling around the Sun. However, after a long time, scientists succeeded in discovering it. The interesting thing is that the newly discovered system is so huge that it has a place to fill one billion or one billion worlds. In most cases, ice, dust, etc. are detected.

The Uranus:Uranus is a planet in the solar system. It is ranked seventh from the Sun and the third largest in size. The name of William Herschel is specially associated with the discovery of this planet. Originally, many astronomers had previously seen this planet, but they could not have considered it as a solar planet. In 1690 John Flamstead saw this planet for at least six times. He named this planet as a star of the constellation of Taurus on its star list. French astronomer Pierre Lemoniae observed this planet approximately 12 times from 1750 to 1769. But he also marked it as a star. Sir William Herschel first observed this planet on March 13, 1781 and specifically mentioned it as a comet on April 26 of that year. After further observation, he recognized it as the planet of the solar system. In the beginning, many astronomers did not want to believe it. Ultimately, it is accepted internationally as a planet.

The Neptune:Neptune is the eighth planet in the Solar System and the most distant planet from the Sun, which is named after the Roman sea deity Neptune. Neptune is the fourth and third largest planet in the range.

Naming

According to legend, Neptune is the sea and the god of water. Neptune Saturn (Saturn) and Aps's son. Jupiter (Jupiter) brother and husband of Amphitrya Neptune's symbol "Trishul" for giving scepter is "Trishul"