Asteroids are large space objects made of rock and ice. There are hundreds of thousands of asteroids in our solar system. Though we often hear ideas about establishing colonies of humans to live and work on our Moon or our neighboring planet, Mars, some think that sending people to an asteroid would actually be the best colonization option for a number of reasonsLow GravityTo begin with, asteroids are often much smaller than planets, so they have lower gravity. When landing a spaceship, the craft would not be pulled as strongly or as forcefully toward the asteroid's surface, making the landing safer than landing on the Moon or Mars; it would also allow a spacecraft to carry much more equipment needed to set up the colony. It would also be easier for the spacecraft to take off again, so the spaceship would need to carry considerably less fuel for the trip back to Earth.Mining Valuable MetalsNext some asteroids are rich in valuable elements and precious metals that are relatively rare on Earth, such as gold and platinum. An asteroid colony would be extremely profitable and a good source of these raw materials. The colonists or businesses sponsoring them could more than pay for the cost of their support by mining minerals and sending them back to Earth.Easy to ReachFinally, asteroids are a good option for colonization because some of them would be very easy to reach. There are a number of asteroids that periodically come within or near Earth's orbit Some of them actually get closer to Earth than our Moon. So these asteroids would be much easier and more affordable to get to and get back from than a planet like Mars, which would require a two-year trip in each direction..
The text and the lecture offer two opposing views on asteroid colonization. While the text suggests that colonizing asteroids is a better option than establishing colonies in other planets, the professor casts doubts on all the specific points presented in the reading. The professor is of the opinion that asteroid colonization is not as practical as suggested by the author.
First of all, the professor argues that low gravity can cause health risks to humans. In the lecture, he states that although low gravity can, indeed, make landing and taking off easier, it also has negative effects on human health. He elaborates on this by mentioning that astronauts on missions to Mars experienced loss of both muscle mass and bone density due to low gravity. Therefore, the long-term effect of a low gravity environment on colonies of humans might be worse.
Secondly, while asteroids might be rich in metals and raw materials, the lecturer states that the author of the passage is not taking into account the whole picture. The professor contends that the author ignores the cost of supporting a colony and transporting material back and forth from asteroids.. Furthermore, there is not guarantee that the price of the metals would remain the same. If the mining on asteroids create a greater supply of minerals and precious metals then that means that market price would eventually decrease. After all, the price depends on the available supply and demand.
Finally, asteroids do not provide an easy way to return to Earth. According to the professor, the orbital path of asteroids is unusual and unpredictable. Asteroids could get close to Earth but then travel far away, even further than Mars. The lecturer argues that although reaching asteroids might be easier than travelling to Mars, a problem still remains. It would be a challenge to return to Earth if the astereoid moves too far away from our planet.
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| 2020-01-16 | Kalima | 81 | view |
| 2019-12-29 | Bonjourkmm | 83 | view |
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Grammar and spelling errors:
Line 5, column 301, Rule ID: DOUBLE_PUNCTUATION
Message: Two consecutive dots
Suggestion: .
...g material back and forth from asteroids.. Furthermore, there is not guarantee tha...
^^
Transition Words or Phrases used:
also, but, finally, first, furthermore, if, second, secondly, so, still, then, therefore, while, after all, first of all
Attributes: Values AverageValues Percentages(Values/AverageValues)% => Comments
Performance on Part of Speech:
To be verbs : 10.0 10.4613686534 96% => OK
Auxiliary verbs: 9.0 5.04856512141 178% => OK
Conjunction : 10.0 7.30242825607 137% => OK
Relative clauses : 11.0 12.0772626932 91% => OK
Pronoun: 17.0 22.412803532 76% => OK
Preposition: 39.0 30.3222958057 129% => OK
Nominalization: 3.0 5.01324503311 60% => More nominalizations (nouns with a suffix like: tion ment ence ance) wanted.
Performance on vocabulary words:
No of characters: 1605.0 1373.03311258 117% => OK
No of words: 316.0 270.72406181 117% => OK
Chars per words: 5.07911392405 5.08290768461 100% => OK
Fourth root words length: 4.21620550194 4.04702891845 104% => OK
Word Length SD: 2.67930724437 2.5805825403 104% => OK
Unique words: 180.0 145.348785872 124% => OK
Unique words percentage: 0.569620253165 0.540411800872 105% => OK
syllable_count: 486.9 419.366225166 116% => OK
avg_syllables_per_word: 1.5 1.55342163355 97% => OK
A sentence (or a clause, phrase) starts by:
Pronoun: 4.0 3.25607064018 123% => OK
Article: 11.0 8.23620309051 134% => OK
Subordination: 4.0 1.25165562914 320% => Less adverbial clause wanted.
Conjunction: 0.0 1.51434878587 0% => OK
Preposition: 3.0 2.5761589404 116% => OK
Performance on sentences:
How many sentences: 17.0 13.0662251656 130% => OK
Sentence length: 18.0 21.2450331126 85% => The Avg. Sentence Length is relatively short.
Sentence length SD: 36.2552466076 49.2860985944 74% => OK
Chars per sentence: 94.4117647059 110.228320801 86% => OK
Words per sentence: 18.5882352941 21.698381199 86% => OK
Discourse Markers: 7.05882352941 7.06452816374 100% => OK
Paragraphs: 4.0 4.09492273731 98% => OK
Language errors: 1.0 4.19205298013 24% => OK
Sentences with positive sentiment : 5.0 4.33554083885 115% => OK
Sentences with negative sentiment : 8.0 4.45695364238 179% => OK
Sentences with neutral sentiment: 4.0 4.27373068433 94% => OK
What are sentences with positive/Negative/neutral sentiment?
Coherence and Cohesion:
Essay topic to essay body coherence: 0.141027711329 0.272083759551 52% => OK
Sentence topic coherence: 0.0437891775063 0.0996497079465 44% => OK
Sentence topic coherence SD: 0.0306621857082 0.0662205650399 46% => Sentences are similar to each other.
Paragraph topic coherence: 0.0800723838336 0.162205337803 49% => OK
Paragraph topic coherence SD: 0.0458265317373 0.0443174109184 103% => OK
Essay readability:
automated_readability_index: 11.8 13.3589403974 88% => Automated_readability_index is low.
flesch_reading_ease: 61.67 53.8541721854 115% => OK
smog_index: 3.1 5.55761589404 56% => Smog_index is low.
flesch_kincaid_grade: 9.1 11.0289183223 83% => OK
coleman_liau_index: 12.18 12.2367328918 100% => OK
dale_chall_readability_score: 9.08 8.42419426049 108% => OK
difficult_words: 91.0 63.6247240618 143% => OK
linsear_write_formula: 11.0 10.7273730684 103% => OK
gunning_fog: 9.2 10.498013245 88% => OK
text_standard: 9.0 11.2008830022 80% => OK
What are above readability scores?
---------------------
Rates: 78.3333333333 out of 100
Scores by essay e-grader: 23.5 Out of 30
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Note: the e-grader does NOT examine the meaning of words and ideas. VIP users will receive further evaluations by advanced module of e-grader and human graders.