Many scientists believe it would be possible to maintain a permanent human presence on Mars or the Moon. On the other hand, conditions on Venus are so extreme and inhospitable that maintaining a human presence there would be impossible.
First, atmospheric pressure at Venus’ surface is at least 90 times greater than the pressure at Earth’s surface. This means that a force of 100 kilograms is pressing down on every square centimeter of surface. All spacecraft that have landed on Venus have been crushed by this extreme pressure within an hour of landing. Almost anything humans might land on Venus would be crushed as well.
Second, as far as we know, there are no reservoirs of water on Venus' surface, and the planet's atmosphere, made up mostly of carbon dioxide, nitrogen, and sulfuric acid, contains hardly any oxygen or water vapor Water and oxygen would therefore probably have to be supplied to Venus from Earth. The idea of ensuring a regular supply of water and oxygen from Earth is impractical in the extreme and would probably defeat the purpose of establishing a permanent station on Venus.
Third, very little sunlight reaches the planet's surface. About 60 percent of the sunlight that hits Venus is reflected back into space by the thick clouds that fill the atmosphere, which means that only 40 percent of the sunlight can get through the clouds Below these clouds is a dense layer of carbon dioxide, which blocks even more light, so very little light reaches the surface. The lack of light would prevent the use of solar power cells, so humans could not get electricity to power their machines and equipment.
Many scientists believe it would be possible to maintain a permanent human presence on Mars or the Moon. On the other hand, conditions on Venus are so extreme and inhospitable that maintaining a human presence there would be impossible.
First, atmospheric pressure at Venus’ surface is at least 90 times greater than the pressure at Earth’s surface. This means that a force of 100 kilograms is pressing down on every square centimeter of surface. All spacecraft that have landed on Venus have been crushed by this extreme pressure within an hour of landing. Almost anything humans might land on Venus would be crushed as well.
Second, as far as we know, there are no reservoirs of water on Venus' surface, and the planet's atmosphere, made up mostly of carbon dioxide, nitrogen, and sulfuric acid, contains hardly any oxygen or water vapor Water and oxygen would therefore probably have to be supplied to Venus from Earth. The idea of ensuring a regular supply of water and oxygen from Earth is impractical in the extreme and would probably defeat the purpose of establishing a permanent station on Venus.
Third, very little sunlight reaches the planet's surface. About 60 percent of the sunlight that hits Venus is reflected back into space by the thick clouds that fill the atmosphere, which means that only 40 percent of the sunlight can get through the clouds Below these clouds is a dense layer of carbon dioxide, which blocks even more light, so very little light reaches the surface. The lack of light would prevent the use of solar power cells, so humans could not get electricity to power their machines and equipment.
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Comments
Essay evaluations by e-grader
Grammar and spelling errors:
Line 5, column 87, Rule ID: POSSESIVE_APOSTROPHE[2]
Message: Possible typo: apostrophe is missing. Did you mean 'planets'' or 'planet's'?
Suggestion: planets'; planet's
...oirs of water on Venus surface, and the planets atmosphere, made up mostly of carbon di...
^^^^^^^
Line 5, column 170, Rule ID: ADVERB_WORD_ORDER[9]
Message: The adverb 'hardly' is usually put before the verb 'contains'.
Suggestion: hardly contains
...n dioxide, nitrogen, and sulfuric acid, contains hardly any oxygen or water vapor Water and oxy...
^^^^^^^^^^^^^^^
Transition Words or Phrases used:
first, second, so, therefore, third, well, at least, on the other hand
Attributes: Values AverageValues Percentages(Values/AverageValues)% => Comments
Performance on Part of Speech:
To be verbs : 12.0 10.4613686534 115% => OK
Auxiliary verbs: 9.0 5.04856512141 178% => OK
Conjunction : 9.0 7.30242825607 123% => OK
Relative clauses : 8.0 12.0772626932 66% => More relative clauses wanted.
Pronoun: 12.0 22.412803532 54% => OK
Preposition: 40.0 30.3222958057 132% => OK
Nominalization: 4.0 5.01324503311 80% => OK
Performance on vocabulary words:
No of characters: 1367.0 1373.03311258 100% => OK
No of words: 276.0 270.72406181 102% => OK
Chars per words: 4.95289855072 5.08290768461 97% => OK
Fourth root words length: 4.07593519647 4.04702891845 101% => OK
Word Length SD: 2.50821743364 2.5805825403 97% => OK
Unique words: 157.0 145.348785872 108% => OK
Unique words percentage: 0.56884057971 0.540411800872 105% => OK
syllable_count: 417.6 419.366225166 100% => 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: 2.0 8.23620309051 24% => OK
Subordination: 1.0 1.25165562914 80% => OK
Conjunction: 2.0 1.51434878587 132% => 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: 25.0 21.2450331126 118% => OK
Sentence length SD: 83.263496908 49.2860985944 169% => OK
Chars per sentence: 124.272727273 110.228320801 113% => OK
Words per sentence: 25.0909090909 21.698381199 116% => OK
Discourse Markers: 6.36363636364 7.06452816374 90% => OK
Paragraphs: 4.0 4.09492273731 98% => OK
Language errors: 2.0 4.19205298013 48% => OK
Sentences with positive sentiment : 1.0 4.33554083885 23% => More positive sentences wanted.
Sentences with negative sentiment : 8.0 4.45695364238 179% => OK
Sentences with neutral sentiment: 2.0 4.27373068433 47% => OK
What are sentences with positive/Negative/neutral sentiment?
Coherence and Cohesion:
Essay topic to essay body coherence: 0.382323375897 0.272083759551 141% => OK
Sentence topic coherence: 0.180541455817 0.0996497079465 181% => OK
Sentence topic coherence SD: 0.241870051475 0.0662205650399 365% => The coherence between sentences is low.
Paragraph topic coherence: 0.294196393073 0.162205337803 181% => OK
Paragraph topic coherence SD: 0.336638162558 0.0443174109184 760% => More connections among paragraphs wanted.
Essay readability:
automated_readability_index: 14.4 13.3589403974 108% => OK
flesch_reading_ease: 54.56 53.8541721854 101% => OK
smog_index: 3.1 5.55761589404 56% => Smog_index is low.
flesch_kincaid_grade: 11.9 11.0289183223 108% => OK
coleman_liau_index: 11.73 12.2367328918 96% => OK
dale_chall_readability_score: 8.37 8.42419426049 99% => OK
difficult_words: 61.0 63.6247240618 96% => OK
linsear_write_formula: 8.0 10.7273730684 75% => OK
gunning_fog: 12.0 10.498013245 114% => OK
text_standard: 12.0 11.2008830022 107% => OK
What are above readability scores?
---------------------
Rates: 76.6666666667 out of 100
Scores by essay e-grader: 23.0 Out of 30
---------------------
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.
Grammar and spelling errors:
Line 5, column 87, Rule ID: POSSESIVE_APOSTROPHE[2]
Message: Possible typo: apostrophe is missing. Did you mean 'planets'' or 'planet's'?
Suggestion: planets'; planet's
...oirs of water on Venus surface, and the planets atmosphere, made up mostly of carbon di...
^^^^^^^
Line 5, column 170, Rule ID: ADVERB_WORD_ORDER[9]
Message: The adverb 'hardly' is usually put before the verb 'contains'.
Suggestion: hardly contains
...n dioxide, nitrogen, and sulfuric acid, contains hardly any oxygen or water vapor Water and oxy...
^^^^^^^^^^^^^^^
Transition Words or Phrases used:
first, second, so, therefore, third, well, at least, on the other hand
Attributes: Values AverageValues Percentages(Values/AverageValues)% => Comments
Performance on Part of Speech:
To be verbs : 12.0 10.4613686534 115% => OK
Auxiliary verbs: 9.0 5.04856512141 178% => OK
Conjunction : 9.0 7.30242825607 123% => OK
Relative clauses : 8.0 12.0772626932 66% => More relative clauses wanted.
Pronoun: 12.0 22.412803532 54% => OK
Preposition: 40.0 30.3222958057 132% => OK
Nominalization: 4.0 5.01324503311 80% => OK
Performance on vocabulary words:
No of characters: 1367.0 1373.03311258 100% => OK
No of words: 276.0 270.72406181 102% => OK
Chars per words: 4.95289855072 5.08290768461 97% => OK
Fourth root words length: 4.07593519647 4.04702891845 101% => OK
Word Length SD: 2.50821743364 2.5805825403 97% => OK
Unique words: 157.0 145.348785872 108% => OK
Unique words percentage: 0.56884057971 0.540411800872 105% => OK
syllable_count: 417.6 419.366225166 100% => 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: 2.0 8.23620309051 24% => OK
Subordination: 1.0 1.25165562914 80% => OK
Conjunction: 2.0 1.51434878587 132% => 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: 25.0 21.2450331126 118% => OK
Sentence length SD: 83.263496908 49.2860985944 169% => OK
Chars per sentence: 124.272727273 110.228320801 113% => OK
Words per sentence: 25.0909090909 21.698381199 116% => OK
Discourse Markers: 6.36363636364 7.06452816374 90% => OK
Paragraphs: 4.0 4.09492273731 98% => OK
Language errors: 2.0 4.19205298013 48% => OK
Sentences with positive sentiment : 1.0 4.33554083885 23% => More positive sentences wanted.
Sentences with negative sentiment : 8.0 4.45695364238 179% => OK
Sentences with neutral sentiment: 2.0 4.27373068433 47% => OK
What are sentences with positive/Negative/neutral sentiment?
Coherence and Cohesion:
Essay topic to essay body coherence: 0.382323375897 0.272083759551 141% => OK
Sentence topic coherence: 0.180541455817 0.0996497079465 181% => OK
Sentence topic coherence SD: 0.241870051475 0.0662205650399 365% => The coherence between sentences is low.
Paragraph topic coherence: 0.294196393073 0.162205337803 181% => OK
Paragraph topic coherence SD: 0.336638162558 0.0443174109184 760% => More connections among paragraphs wanted.
Essay readability:
automated_readability_index: 14.4 13.3589403974 108% => OK
flesch_reading_ease: 54.56 53.8541721854 101% => OK
smog_index: 3.1 5.55761589404 56% => Smog_index is low.
flesch_kincaid_grade: 11.9 11.0289183223 108% => OK
coleman_liau_index: 11.73 12.2367328918 96% => OK
dale_chall_readability_score: 8.37 8.42419426049 99% => OK
difficult_words: 61.0 63.6247240618 96% => OK
linsear_write_formula: 8.0 10.7273730684 75% => OK
gunning_fog: 12.0 10.498013245 114% => OK
text_standard: 12.0 11.2008830022 107% => OK
What are above readability scores?
---------------------
Rates: 76.6666666667 out of 100
Scores by essay e-grader: 23.0 Out of 30
---------------------
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.