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Zorluk: ZorExplicit Detail Retrieval

In her 2011 study on medieval Far Eastern astronomical records, astrophysicist Naomi Seki re-evaluated twelfth-century Song dynasty chronicles describing the guest star of 1181 CE (SN 1181). Prior historical analyses asserted that court astronomers in Lin'an recorded the guest star solely as an ominous portent predicting dynastic instability, thereby neglecting any systematically quantified positional coordinates. However, Seki discovered that while the initial imperial memorial emphasized astrological foreboding, a subsequent non-canonical log kept by assistant observer Guo Xian detailed the object’s location relative to the asterism Huagai over a span of 185 days. Notably, Guo recorded that the guest star maintained an unchanging faint luminosity for its final three weeks before fading beyond naked-eye visibility, rather than experiencing the continuous exponential decay typical of Type Ia supernovae. Seki demonstrated that this unusual plateau in brightness was preserved because Guo utilized a standardized six-tiered visual magnitude scale introduced during the Northern Song period, rather than relying on qualitative descriptors. Nevertheless, because Guo’s log was omitted from the official Song Shi annals due to bureaucratic rivalries between observational factions, modern scholars using only imperial compilations erroneously concluded that Song observational techniques lacked quantitative precision.

According to the passage, Seki attributes the preservation of specific observational details regarding the brightness pattern of the 1181 CE guest star to which of the following factors?

  1. Guo Xian's utilization of a standardized six-tiered visual magnitude scale.Cevap
  2. B
    The official incorporation of Guo Xian's observational log into the Song Shi annals.
  3. C
    The guest star's continuous exponential decay in luminosity characteristic of Type Ia supernovae.
  4. D
    The total absence of astrological interpretations in the initial imperial memorials.
  5. E
    The adoption of novel observational instruments developed during the subsequent Southern Song era.

Cevap

The correct answer is the option stating that the preservation of observational details regarding the star's brightness pattern was due to Guo Xian's utilization of a standardized six-tiered visual magnitude scale.
The passage explicitly states that 'Seki demonstrated that this unusual plateau in brightness was preserved because Guo utilized a standardized six-tiered visual magnitude scale introduced during the Northern Song period.' This directly matches the option citing Guo Xian's utilization of a standardized six-tiered visual magnitude scale.

Adım Adım Çözüm

1
Identify the key terms in the question stem
The prompt asks for what Seki claims caused the preservation of specific observational details about the brightness pattern of the 1181 CE guest star.
Explicit detail retrieval requires matching the precise causal mechanism described by the author.
2
Locate the relevant evidence in the passage
Found sentence: 'Seki demonstrated that this unusual plateau in brightness was preserved because Guo utilized a standardized six-tiered visual magnitude scale introduced during the Northern Song period...'
This sentence directly provides the cause ('because') for why details regarding the brightness plateau were preserved.
3
Match the explicit fact with the correct option
The choice referencing Guo Xian's utilization of a standardized six-tiered visual magnitude scale accurately paraphrases the explicit passage detail.
The correct answer must strictly reflect the passage fact without adding external assumptions or altering negated modifiers.

Anahtar Kavram

Explicit Detail Retrieval
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Explicit Detail Retrieval

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