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 reasons.Low 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.
In the reading material, the writer cites three reasons to support the view that sending people to an asteroid would be an excellent colonization choice. Nevertheless, the speaker in the listening material argues that colonizing on the asteroid is not practical and have many downsides, and opposes the viewpoints made in the passage.
First of all, the author contends that the low gravity on the asteroids could make spaceship land safely and easy to return to the earth. However, the speaker in the lecture refutes that the low gravity in in fact brings a lot of risks to the astronomers that they might get many healthy problems, such as muscle losing and bone density decreasing, if they are exposed in the low gravity for a long term in the process of colonization.
In addition, the lecturer casts the doubt on the author's second reason that mining rare valuable metals on some asteroids so profitable that money made from the business is more than the space trip cost; the lecturer demonstrates that the profit business is not the whole picture as there is a lot of additional cost which would reduct the later profit. Moreover, no one could guarantee the price of the sold rare mental because the price would be lower if the market have large quantity of the mental.
Finally, opposing the author's third view that asteroids are near the earth and are easy to reach, therefore, the cost of colonization could be affordable, the lecturer argues that it is not easy to return though. This is because the orbit is unusual and asteroids are moving far away from the earth, causing returning point is farther away from the earth even though one point is easy to reach. Therefore, getting back to the earth can be a big challenge.
| Post date | Users | Rates | Link to Content |
|---|---|---|---|
| 2023-09-09 | xujia | 75 | view |
| 2023-07-18 | YasamanEsml | 32 | view |
| 2023-07-18 | YasamanEsml | 3 | view |
| 2023-07-18 | YasamanEsml | 3 | view |
| 2023-07-18 | YasamanEsml | 3 | view |
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Grammar and spelling errors:
Line 3, column 204, Rule ID: ENGLISH_WORD_REPEAT_RULE
Message: Possible typo: you repeated a word
Suggestion: in
...he lecture refutes that the low gravity in in fact brings a lot of risks to the astro...
^^^^^
Transition Words or Phrases used:
finally, first, however, if, moreover, nevertheless, second, so, therefore, third, in addition, in fact, such as, first of all
Attributes: Values AverageValues Percentages(Values/AverageValues)% => Comments
Performance on Part of Speech:
To be verbs : 17.0 10.4613686534 163% => OK
Auxiliary verbs: 8.0 5.04856512141 158% => OK
Conjunction : 6.0 7.30242825607 82% => OK
Relative clauses : 11.0 12.0772626932 91% => OK
Pronoun: 14.0 22.412803532 62% => OK
Preposition: 33.0 30.3222958057 109% => OK
Nominalization: 4.0 5.01324503311 80% => OK
Performance on vocabulary words:
No of characters: 1444.0 1373.03311258 105% => OK
No of words: 300.0 270.72406181 111% => OK
Chars per words: 4.81333333333 5.08290768461 95% => OK
Fourth root words length: 4.16179145029 4.04702891845 103% => OK
Word Length SD: 2.51639071335 2.5805825403 98% => OK
Unique words: 159.0 145.348785872 109% => OK
Unique words percentage: 0.53 0.540411800872 98% => OK
syllable_count: 448.2 419.366225166 107% => OK
avg_syllables_per_word: 1.5 1.55342163355 97% => OK
A sentence (or a clause, phrase) starts by:
Pronoun: 1.0 3.25607064018 31% => OK
Article: 8.0 8.23620309051 97% => OK
Subordination: 1.0 1.25165562914 80% => OK
Conjunction: 1.0 1.51434878587 66% => OK
Preposition: 2.0 2.5761589404 78% => OK
Performance on sentences:
How many sentences: 9.0 13.0662251656 69% => Need more sentences. Double check the format of sentences, make sure there is a space between two sentences, or have enough periods. And also check the lengths of sentences, maybe they are too long.
Sentence length: 33.0 21.2450331126 155% => The Avg. Sentence Length is relatively long.
Sentence length SD: 82.671744169 49.2860985944 168% => OK
Chars per sentence: 160.444444444 110.228320801 146% => OK
Words per sentence: 33.3333333333 21.698381199 154% => OK
Discourse Markers: 14.0 7.06452816374 198% => OK
Paragraphs: 4.0 4.09492273731 98% => OK
Language errors: 1.0 4.19205298013 24% => OK
Sentences with positive sentiment : 6.0 4.33554083885 138% => OK
Sentences with negative sentiment : 3.0 4.45695364238 67% => OK
Sentences with neutral sentiment: 0.0 4.27373068433 0% => More facts, knowledge or examples wanted.
What are sentences with positive/Negative/neutral sentiment?
Coherence and Cohesion:
Essay topic to essay body coherence: 0.085278512647 0.272083759551 31% => The similarity between the topic and the content is low.
Sentence topic coherence: 0.0357779100933 0.0996497079465 36% => Sentence topic similarity is low.
Sentence topic coherence SD: 0.0232963245431 0.0662205650399 35% => Sentences are similar to each other.
Paragraph topic coherence: 0.0505370982543 0.162205337803 31% => Maybe some paragraphs are off the topic.
Paragraph topic coherence SD: 0.0177570705315 0.0443174109184 40% => Paragraphs are similar to each other. Some content may get duplicated or it is not exactly right on the topic.
Essay readability:
automated_readability_index: 17.9 13.3589403974 134% => OK
flesch_reading_ease: 46.44 53.8541721854 86% => OK
smog_index: 8.8 5.55761589404 158% => OK
flesch_kincaid_grade: 15.0 11.0289183223 136% => OK
coleman_liau_index: 11.21 12.2367328918 92% => OK
dale_chall_readability_score: 8.64 8.42419426049 103% => OK
difficult_words: 64.0 63.6247240618 101% => OK
linsear_write_formula: 13.5 10.7273730684 126% => OK
gunning_fog: 15.2 10.498013245 145% => OK
text_standard: 9.0 11.2008830022 80% => OK
What are above readability scores?
---------------------
It is not exactly right on the topic in the view of e-grader. Maybe there is a wrong essay topic.
Rates: 3.33333333333 out of 100
Scores by essay e-grader: 1.0 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.