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 Gravity
To 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 Metals
Next, 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 Reach
Finally, 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.
According the the passage, the author consider building colonies on asteroids promising, however the professor in the lecture disagrees.
To begin with, the author states that low gravity allow astronomers to land faster with more equipments and less fuel. Conversely, the professor stressed that low gravity contains many possible risks like losing muscle and bone density. Astronomers who stay in the university for only a few month will have to deal with such problem, left alone people who want to colonize asteroids.
Secondly, the writer puts forward that precious metals contained in the asteroids can help motivate bussinesses sponsoring this project because these metals are very profitable on earth. Nevertheless, the lecturer maintains that exploiting metals on asteroids has additional costs like the transportation fee and support equipment. Apart from this, there's no promise that the price of these metal can remain high when it is no longer rare.
Thirdly, the writer mentioned that asteroids compared with other plants, are more easy to reach because they periodically come close to Earth. Unfortunately, the lecturer pointed out that astronomers may find themselves hard to return Earth. Rather than stay close to Earth, asteroids comes close to Earth periodically but also move far way from Earth. It would be difficult for astronomers to return when the asteroids are far away from earth.
| 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 |
Grammar and spelling errors:
Line 1, column 11, Rule ID: ENGLISH_WORD_REPEAT_RULE
Message: Possible typo: you repeated a word
Suggestion: the
According the the passage, the author consider building c...
^^^^^^^
Line 1, column 11, Rule ID: DT_DT[1]
Message: Maybe you need to remove one determiner so that only 'the' or 'the' is left.
Suggestion: the; the
According the the passage, the author consider building c...
^^^^^^^
Line 3, column 288, Rule ID: MANY_NN[1]
Message: Possible agreement error. The noun month seems to be countable; consider using: 'few months'.
Suggestion: few months
...s who stay in the university for only a few month will have to deal with such problem, le...
^^^^^^^^^
Line 5, column 350, Rule ID: EN_CONTRACTION_SPELLING
Message: Possible spelling mistake found
Suggestion: there's
...and support equipment. Apart from this, theres no promise that the price of these meta...
^^^^^^
Transition Words or Phrases used:
also, but, conversely, however, if, may, nevertheless, second, secondly, so, third, thirdly, apart from, to begin with
Attributes: Values AverageValues Percentages(Values/AverageValues)% => Comments
Performance on Part of Speech:
To be verbs : 5.0 10.4613686534 48% => More to be verbs wanted.
Auxiliary verbs: 5.0 5.04856512141 99% => OK
Conjunction : 4.0 7.30242825607 55% => More conjunction wanted.
Relative clauses : 11.0 12.0772626932 91% => OK
Pronoun: 15.0 22.412803532 67% => OK
Preposition: 27.0 30.3222958057 89% => OK
Nominalization: 2.0 5.01324503311 40% => More nominalizations (nouns with a suffix like: tion ment ence ance) wanted.
Performance on vocabulary words:
No of characters: 1198.0 1373.03311258 87% => OK
No of words: 220.0 270.72406181 81% => More content wanted.
Chars per words: 5.44545454545 5.08290768461 107% => OK
Fourth root words length: 3.85128510684 4.04702891845 95% => OK
Word Length SD: 2.73560847327 2.5805825403 106% => OK
Unique words: 142.0 145.348785872 98% => OK
Unique words percentage: 0.645454545455 0.540411800872 119% => OK
syllable_count: 365.4 419.366225166 87% => OK
avg_syllables_per_word: 1.7 1.55342163355 109% => OK
A sentence (or a clause, phrase) starts by:
Pronoun: 1.0 3.25607064018 31% => OK
Article: 7.0 8.23620309051 85% => OK
Subordination: 0.0 1.25165562914 0% => More adverbial clause wanted.
Conjunction: 0.0 1.51434878587 0% => OK
Preposition: 2.0 2.5761589404 78% => OK
Performance on sentences:
How many sentences: 11.0 13.0662251656 84% => 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: 20.0 21.2450331126 94% => OK
Sentence length SD: 26.0133468603 49.2860985944 53% => The essay contains lots of sentences with the similar length. More sentence varieties wanted.
Chars per sentence: 108.909090909 110.228320801 99% => OK
Words per sentence: 20.0 21.698381199 92% => OK
Discourse Markers: 10.7272727273 7.06452816374 152% => OK
Paragraphs: 4.0 4.09492273731 98% => OK
Language errors: 4.0 4.19205298013 95% => OK
Sentences with positive sentiment : 4.0 4.33554083885 92% => OK
Sentences with negative sentiment : 6.0 4.45695364238 135% => OK
Sentences with neutral sentiment: 1.0 4.27373068433 23% => More facts, knowledge or examples wanted.
What are sentences with positive/Negative/neutral sentiment?
Coherence and Cohesion:
Essay topic to essay body coherence: 0.0602666515291 0.272083759551 22% => The similarity between the topic and the content is low.
Sentence topic coherence: 0.0253116276126 0.0996497079465 25% => Sentence topic similarity is low.
Sentence topic coherence SD: 0.0252441517524 0.0662205650399 38% => Sentences are similar to each other.
Paragraph topic coherence: 0.0404726119954 0.162205337803 25% => Maybe some paragraphs are off the topic.
Paragraph topic coherence SD: 0.0267728135956 0.0443174109184 60% => OK
Essay readability:
automated_readability_index: 14.2 13.3589403974 106% => OK
flesch_reading_ease: 42.72 53.8541721854 79% => OK
smog_index: 8.8 5.55761589404 158% => OK
flesch_kincaid_grade: 12.3 11.0289183223 112% => OK
coleman_liau_index: 14.33 12.2367328918 117% => OK
dale_chall_readability_score: 8.65 8.42419426049 103% => OK
difficult_words: 56.0 63.6247240618 88% => OK
linsear_write_formula: 11.0 10.7273730684 103% => OK
gunning_fog: 10.0 10.498013245 95% => OK
text_standard: 9.0 11.2008830022 80% => OK
What are above readability scores?
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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.