"Venus: Our Sister Planet?" Is Short Essay That Compares Venus To Earth. It Has 795 Words And 5 References.

795 words - 3 pages

"Venus: Our Sister Planet?"Venus is known as the jewel of the sky. It was thought to be two different planets by ancient astronomers and thus referred to as the morning star and the evening star. Early astronomers also referred to Venus as Earth's sister planet. Both are considered young planets due to the low number of craters and both are similar in size, and their chemical compositions are similar. The surface of Venus has many features, which are similar to the Earth such as canyons, volcanoes, lava flows, rift valleys, mountains, craters, and plains. The comparisons basically end there.Venus differs from the Earth in many ways. The one big difference that I noticed was the surface temperature of the planet. It reaches a surface temperature of 900° F. This is hotter than Mercury, which is closer to the sun. This temperature is hot enough to melt lead. This higher temperature is attributed to a runaway greenhouse effect caused by the heavy atmosphere of carbon dioxide. This would also probably account for the lack of water on the planet. The oceans, if there were ever any, were probably boiled away millions of years ago. The extremely hot temperature also attributes to the fact that no life forms have been found on Venus.Venus makes one trip around the sun faster than it can rotate once. It takes 225 Earth days for Venus to orbit the Sun and it takes 243 days for it to rotate once. A Venusian day is longer than a Venusian year. It also rotates in the opposite direction than the Earth. The Sun would rise in the west and set in the east if observed from Venus. "In addition, the periods of Venus' rotation and of its orbit are synchronized such that it always presents the same face toward Earth when the two planets are at their closest approach." (1)85% of the surface of Venus is covered with volcanic rock. Most of the radar images of Venus indicate many high mountains, which appear to be volcanic in origin. Radar images indicate evidence for recent volcanic activity on Venus. I guess this would also be a contributing factor to the high concentration of carbon dioxide in the atmosphere. This could also contribute to the thick cloud layer surrounding the planet. These clouds are composed of sulfuric acid. Strong winds in the upper atmosphere push these clouds around Venus once every four days. There is...

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