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11 Jan 2026, 22:00
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E
Be sure to select an answer first to save it in the Error Log before revealing the correct answer (OA)!
Difficulty:
85%
(hard)
Question Stats:
52% (02:19) correct
48%
(02:12)
wrong
based on 177
sessions
History
Date
Time
Result
Not Attempted Yet
Astronomical data gathered by the Hubble Space Telescope suggests that yellow, medium-sized stars similar to the sun form less than ten percent of the stars in the Milky Way. Of over 75 million catalogued stars in the core of the Milky Way, where the density of stars is much higher than that in any of the arms, almost all are much larger red stars.
Which of the following, if true, would most weaken the above justification of the claim that stars similar to the sun form less than ten percent of the stars in the Milky Way?
A. There are billions of stars in regions of the Milky Way that the Hubble Space Telescope has not observed.
B. The Hubble Space Telescope would have detected any smaller stars similar to the sun in the regions of the Milky Way in which larger stars have been detected.
C. Even a large star that exists in one of the arms of the Milky Way is not as easily detected by the Hubble Space Telescope as a similar-sized star in the core of the Milky Way is.
D. The current, most accurate astronomical theories predict that almost all stars in the core of the Milky Way are millions of times larger than the sun.
E. The smaller a star is relative to the size of others in its region of the Milky Way, the more difficult it is for the Hubble Space Telescope to detect.
Which of the following, if true, would most weaken the above justification of the claim that stars similar to the sun form less than ten percent of the stars in the Milky Way?
A. There are billions of stars in regions of the Milky Way that the Hubble Space Telescope has not observed.
B. The Hubble Space Telescope would have detected any smaller stars similar to the sun in the regions of the Milky Way in which larger stars have been detected.
C. Even a large star that exists in one of the arms of the Milky Way is not as easily detected by the Hubble Space Telescope as a similar-sized star in the core of the Milky Way is.
D. The current, most accurate astronomical theories predict that almost all stars in the core of the Milky Way are millions of times larger than the sun.
E. The smaller a star is relative to the size of others in its region of the Milky Way, the more difficult it is for the Hubble Space Telescope to detect.
12 Jan 2026, 11:39
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Correct: E
E gives a reasoning saying that there are more than 10% stars similar to the sun - they are just not able to be detected by the Hubble Space Telescope.
A: these "billions" of stars not yet observed can be larger ones also. We cannot say for sure. So wrong.
B: This strengthens.
C: This just says that the larger stars in the core are easier to observe. Nothing about the medium sized stars.
D: This strengthens.
E: Correct.
E gives a reasoning saying that there are more than 10% stars similar to the sun - they are just not able to be detected by the Hubble Space Telescope.
A: these "billions" of stars not yet observed can be larger ones also. We cannot say for sure. So wrong.
B: This strengthens.
C: This just says that the larger stars in the core are easier to observe. Nothing about the medium sized stars.
D: This strengthens.
E: Correct.
12 Jan 2026, 12:01
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ExpertsGlobal5
Hubble Space Telescope (HST) is studying Milky Way Galaxy, the astronomical data gathered by HST mentions LESS THAN 10% of stars are yellow medium sized stars, similar to SUN. So, we can infer Sun is a medium sized star.
The Milky Way Galaxy core region has more than 75 Million Catalogued stars, where the Density of Stars at the CORE region is GREATER than the Density of Stars at the arms. The core region had larger red stars.
We need to weaken the justification : stars similar to the sun form less than ten percent of the stars in the Milky Way.
We need to remove the claim strengthening the view Stars similar to sun form less than 10% of the stars.
A. There are billions of stars in regions of the Milky Way that the Hubble Space Telescope has not observed.
This option mentions the HST has not completed its full observation, or there can be technical difficulties that has hampered the observation of stars within Milky Way. So, there is nothing concrete to suggest that it weakens the claim. Hence, Wrong.
B. The Hubble Space Telescope would have detected any smaller stars similar to the sun in the regions of the Milky Way in which larger stars have been detected.
Yeah, this can happen. As stars of different sizes and nature can coexist. The claim is not they remain as isolated compartments with clear demarcation or boundaries. Moreover, within a same area, the HST is capable of detecting both large and smaller stars. This doesn’t weaken the claim, but actually strengthens. Hence, Wrong.
C. Even a large star that exists in one of the arms of the Milky Way is not as easily detected by the Hubble Space Telescope as a similar-sized star in the core of the Milky Way is.
This option makes an irrelevant comparison between the core and arm regions of the Milky Way Galaxy, which is not the core of the debate context. Hence, Wrong.
D. The current, most accurate astronomical theories predict that almost all stars in the core of the Milky Way are millions of times larger than the sun.
We are not speaking about Theories, as they are unproven statements, which may or may not be true. But, the observation from HST is a factual statement. Moreover, it strengthens the claim. Thus, Wrong.
E. The smaller a star is relative to the size of others in its region of the Milky Way, the more difficult it is for the Hubble Space Telescope to detect.
If detecting smaller stars by HST is found to be difficult compared to other larger stars, then there is still more smaller stars which is still unobserved. So, we cannot conclude with a base value, that is much lesser than the actual. Hence, 10% less is not reliable with still more stars to be unearthed and observed. This weakens the claim.
Option E
