Mercury is the smallest terrestrial planet in the solar system‚ about a third of the size of Earth It has a thin atmosphere‚ which causes it to swing between burning and freezing temperatures Mercury is also a dense planet‚ composed mostly of iron and nickel with an iron core Its magnetic field is only about 1 percent that of Earth’s The surface of Mercury is similar to that of the Moon; it has many deep craters and is covered by a thin layer of tiny particle silicates The surface temperature
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Halley’s Comet Astronomers first observed Halley’s Comet as far back as 200 BCE. The comet ’s periodicity was first determined in 1705 by English astronomer Edmond Halley‚ who it was eventually named after. Halley ’s Comet last appeared in the inner Solar System in 1986 and won’t appear again until mid-2061. Although the nucleus of the comet itself is not that large‚ the coma can extend to a very large size. As the gas molecules in the coma are ionized by the solar ultraviolet radiation pressure
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Astronomy 1 Name _________________________ Exam 1 (chap 1-5) I. Multiple Choice. Select all correct answers. 1. Which of the planets known to the ancient astronomers can never be seen high overhead at night? a) Mercury b) Venus c) Mars d)Saturn e) Jupiter 2. On the first day of spring‚ the Sun sets a) north of west b) directly west c) south of west d) can’t answer‚ it depends where you are on Earth. 3. One-hundred arcminutes
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solar systems have been concluded that the universe has many different types of solar systems and noted that Our Solar system was formed 4.5 billion years ago. Our solar system consists of the Sun‚ 8 planets‚ and 5 dwarf planets and asteroids. Many planets have their own moons. However‚ not all planets have moons. Based upon what we learned in the astronomy course of how everything has a beginning and an ending. Our solar system got created from the cloud that was the Solar Nebula. All stars exist
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In his new theory Copernicus was able to explain retro-grade motion in the planets without the use of large epicycles. With the Earth now out in the third orbit he was able to explain retro-grade motion as a perspective shift due to the motion of the Earth. As the earth passes the outer planets on its inner orbit the planets seem to move west even though they continue to move east in their orbits. The inner planets also seem to back up to the west as they pass Earth in their orbit closer to
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other planets and other great wonders that happen so many kilometers away is now more than ever mesmerizing than when I was a little girl. Now‚ it is not only about the Sun‚ Moon‚ and Stars‚ but also about other great wonders across space such as comets‚ geysers‚ planets‚ and many moons. It is fascinating how the universe has many large and small planets with so many differences in structure but yet has so many similarities as to have been being built. From a documentary series‚ The Planets‚ the
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∂ Through the analysis of My Place‚ The Road Not Taken and Good Will Hunting‚ it is evident that inner journey is‚ more than anything else‚ about the process of self-reflection in order to grow in understanding and change one’s self. Many scholars‚ from various disciplines‚ have attempted to answer the question in as objective a manner as possible. What follows is an introduction to some of those answers. We begin by taking a detailed look at the work of the religious scholar Ninian Smart before
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at the night sky‚ wondering what its purpose was and how it worked. The universe has been a mysterious place for thousands of years until more recently where the stars and planets were not being referred to as ‘gods’‚ but as large land masses and giant balls of gas all made up of millions of little
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the formation of the sun and our planets. What is this method I am talking about? I am speaking of the Nebular Hypothesis. The person who came up with the Nebular Hypothesis‚ steps of the Nebular Hypothesis are quite informative‚ the logic behind it‚ and the difference between a hypothesis‚ theory‚ and Scientific Law will hopefully open your eyes to a wonderful exciting view on our Solar System. In 1755‚ Immanuel Kant was the first person to discuss the planet formation. He believed that it
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is in the Sun. Of the many objects that orbit the Sun‚ most of the mass is contained within eight relatively solitary planets whose orbits are almost circular and lie within a nearly flat disc called the ecliptic plane. The four smaller inner planets‚ Mercury‚ Venus‚ Earth and Mars‚ also called the terrestrial planets‚ are primarily composed of rock and metal. The four outer planets‚ the gas giants‚ are substantially more massive than the terrestrials. The two
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