Mars Life Death Hope
Venus is the 2nd closest planet to the Sun, and the closest planet to Earth. Venus can reach visual magnitudes (brightness) of -4.4, making it the brightest object in the night sky, excluding the moon. Venus was once considered Earth's twin, a swampy place with oceans and strange creatures were imagined. After sending probes such as Mariner, Pioneer Venus, Venera (which landed on Venus), Vega, Magellan and Galileo, we know that Venus is the victim of a "run-away" greenhouse effect. Mars is the fourth planet from the Sun. If Venus is the planet with a runaway "greenhouse effect", then Mars is the antithesis; it doesn't have enough Carbon - Dioxide to trap enough of the Sun's energy for water to remain in liquid form. The lack of water between these two planets seems to be one of the contributing factors to the fact that there is no life on these planets. Mars is our hope for starting colonies on other planets, so we must look at how other planets close to us developed in order to tell how Mars would develop in the future. We must also see if Mars was ever capable of having water, and even supported life in the past. The atmosphere of Venus, which is mostly Carbon - Dioxide (98%), traps most of the Suns infrared rays, heating t
There is no general agreement, however, on what form water took on the early Mars. Some scientists identified features which they believe appear to be carved by torrents of water with the force of 10,000 Mississippi Rivers. According to the other theory, Mars was always cold, but water trapped as underground ice was periodically released when heating caused ice to melt and gush forth onto the surface. Two competing views are currently popular in the science community. Added to this were more recent observations by Mars Pathfinder and Mars Global Surveyor, which suggested widespread flowing water in the planet's past. It is believe this would have doomed Mars from the start to the thin atmosphere and desert conditions which exist on the planet today. We must study things like the plate systems on Venus to help us understand how planets themselves evolve, and how it would have changed the planet Mars to the point of eliminating all life and future advancements of life on its surface. Mars is dotted with numerous impact craters, volcanoes and ancient river beds. Bibliography Works citedMars, Water and Life. he surface of the planet beyond the melting point of lead. Venus is believed to have a plate tectonic system that is much different from the plate system on Earth. Even though Mars atmosphere contains a lot of Carbon - Dioxide it is just too thin to obtain thermal equilibrium with the surface or with space to generate a warmer environment by the greenhouse effect. The results were mixed, but are generally accepted as negative, that life is not now present on Mars. Yet scientists who studied images from the Viking orbiter kept encountering features that appeared to be formed by flowing water - among them deep channels and canyons, and even features that appeared to be ancient lake shorelines.
Common topics in this essay:
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Mississippi Rivers,
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Earth Venus,
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carbon dioxide,
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liquid water,
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plate system,
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answer question,
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system plate system,
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Acceptance Essays
