Once positioned in space, the Hubble Space Telescope will : GMAT Sentence Correction (SC)
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# Once positioned in space, the Hubble Space Telescope will

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Once positioned in space, the Hubble Space Telescope will [#permalink]

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28 Nov 2003, 14:21
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Once positioned in space, the Hubble Space Telescope will capture light from sources twenty times fainter compared to those that can be detected by ground-based instruments.
(A) compared to those that can b detected
(B) compared to those they can detect
(C) than that can be detected
(D) than those that can be detected
(E) than those detecting
[Reveal] Spoiler: OA

Last edited by Zarrolou on 25 Jul 2013, 10:31, edited 1 time in total.
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29 Nov 2003, 01:54
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chihao wrote:
Once positioned in space, the Hubble Space Telescope will capture light from sources twenty times fainter compared to those that can be detected by ground-based instruments.
(A) compared to those that can b detected
(B) compared to those they can detect
(C) than that can be detected
(D) than those that can be detected
(E) than those detecting

IMO, D is correct.

"Fainter than" is the correct idiom. We are comparing sources to other sources. Which sources? Those (sources) that can be detected by ground based intruments.
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Re: Once positioned in space, the Hubble Space Telescope will [#permalink]

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25 Jul 2013, 05:42
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IMO..... D is the correct option. Fainter already shows that there is comparison between things..
fainter than seems good to me..
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28 Nov 2003, 16:45
chihao wrote:
Once positioned in space, the Hubble Space Telescope will capture light from sources twenty times fainter compared to those that can be detected by ground-based instruments.
(A) compared to those that can be detected
(B) compared to those they can detect
(C) than that can be detected
(D) than those that can be detected
(E) than those detecting

The last portion of the sentence starting with "BY"...suggests that the sentence is in passive voice..

that leaves us with A , C and D

C is incorrect ...no logical referent for "that"

D ...incorrect...we are comparing the difference in detection

capabilities of two instruments...

We need "compared to " to convey that idea

A .. is best

Last edited by Praetorian on 28 Nov 2003, 21:10, edited 1 time in total.
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28 Nov 2003, 20:39
Praet,

Your detailed explanations and thoughts on answer choices are very helpful, as always!

But, D sounds better to me out of all the cases. "fainter than" sounds better than "fainter compared to"

Thanks.

praetorian123 wrote:
chihao wrote:
Once positioned in space, the Hubble Space Telescope will capture light from sources twenty times fainter compared to those that can be detected by ground-based instruments.
(A) compared to those that can be detected
(B) compared to those they can detect
(C) than that can be detected
(D) than those that can be detected
(E) than those detecting

The last portion of the sentence starting with "BY"...suggests that the sentence is in passive voice..

that leaves us with A , C and D

C is incorrect ...no logical referent for "that"

D ...incorrect...we are comparing two the difference in detection

capabilities of two instruments...

We need "compared to " to convey that idea

A .. is best
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29 Nov 2003, 01:21
i think A and B are wrong because "sources twenty times fainter compared to those " means campared to sources, but here we have to compare telescope. C seems decent.

whats the official answer?
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29 Nov 2003, 06:16
I vote for D too.

"fainter" already implies there is a comparison ... also as written above "fainter than" is correct.
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30 Aug 2010, 10:59
chihao wrote:
Once positioned in space, the Hubble Space Telescope will capture light from sources twenty times fainter compared to those that can be detected by ground-based instruments.
(A) compared to those that can b detected
(B) compared to those they can detect
(C) than that can be detected
(D) than those that can be detected
(E) than those detecting

twenty times fainter - mean we need a than so A and B out.

now by ground-based instruments means we need passive voice in the underline area. So E out.

Now comparison is between two type of sources. So "than those" is meaningful. Undoubtedly D is the answer.
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30 Aug 2010, 22:08
chihao wrote:
Once positioned in space, the Hubble Space Telescope will capture light from sources twenty times fainter compared to those that can be detected by ground-based instruments.
(A) compared to those that can b detected
(B) compared to those they can detect
(C) than that can be detected
(D) than those that can be detected
(E) than those detecting

IMO answer is C !

Someone above said "THAT" in C has no clear referent. I disagree, THAT in option C refers to LIGHT.
Here we are comparing the LIGHT captured by Hubble Space Telescope and LIGHT detected by ground-based instruments. So, we need THAT not THOSE THAT as written in D.

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31 Aug 2010, 07:36
D it is.

We are comparing "sources"

"Hubble telescope will capture light from SOURCES 20 times fainter than those [SOURCES] that can be dectected by ground based instruments."
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31 Aug 2010, 20:06
Thanks seekmba, I agree we are comparing sources. I confused with "light".
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Re: Once positioned in space, the Hubble Space Telescope will [#permalink]

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25 Jul 2013, 06:25
Firstly I thought A is the answer, but when I went the explanations that comparison is for sources, I feel D is the better option of the two.

Whats the OA?
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Re: Once positioned in space, the Hubble Space Telescope will [#permalink]

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30 Aug 2013, 02:14
ER, THAN never go with COMPARED TO/WITH. there is not idioms of that kind, simply
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Re: Once positioned in space, the Hubble Space Telescope will [#permalink]

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05 Aug 2016, 03:18
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Once positioned in space, the Hubble Space Telescope will [#permalink]

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16 Oct 2016, 22:50
When using a comparative adjective ("-er") "than" is required, so "compared to" is wrong.
Answer (A) & (B) are wrong

We need to be clear on what is/are being compared.
There are two nouns in this question that are eligible for comparison, light (that) and sources (those)
For which noun can we use the comparative adjective "fainter"?
Though,
"Fainter" makes more sense with light,
and the verb detected is more appropriate for "light" than "sources"
Answer choice (C) is wrong. Why? Answer choice (C) is missing subject for the "can be detected...." phrase.

(C) The Hubble Space Telescope will capture light from sources twenty times fainter than that [light] can be detected by ground-based instruments.
(C) The Hubble Space Telescope will capture light from sources twenty times fainter than that [light] that [light] can be detected by ground-based instruments.

(D) The Hubble Space Telescope will capture light from sources twenty times fainter than those [sources] that [sources] can be detected detected by ground-based instruments.

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Once positioned in space, the Hubble Space Telescope will   [#permalink] 16 Oct 2016, 22:50
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# Once positioned in space, the Hubble Space Telescope will

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