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- Interpretação de texto | Reading comprehension
- Prova de 2025
- FUVEST
- Dificuldade: Médio
- Código da questão: 93930534-23
Nearly a century ago, Edwin Hubble discovered that the
universe is getting larger. Modern measurements of how fast it is
expanding disagree, however, suggesting that our understanding
of the laws of physics might be off. Everyone expected the sharp
vision of the James Webb Space Telescope to bring the answer
into focus. But a long-awaited analysis of the telescope’s
observations released late Monday evening once again gleans
conflicting expansion rates from different types of data, while
homing in on possible sources of error at the heart of the conflict.
Two rival teams have led the effort to measure the cosmic
expansion rate, which is known as the Hubble constant, or H0.
One of these teams, led by Adam Riess of Johns Hopkins
University, has consistently measured H0 to be about 8 percent
higher than the theoretical prediction for how fast space should
be expanding, based on the cosmos’s known ingredients and
governing equations. This discrepancy, known as the Hubble
tension, suggests that the theoretical model of the cosmos might
be missing something—some extra ingredient or effect that
speeds up cosmic expansion.
Riess and his team released their latest measurement of H0
based on Webb data this spring, getting a value that agrees with
their earlier estimates.
But for years a rival team led by Wendy Freedman of the
University of Chicago has urged caution, arguing that cleaner
measurements were needed. Her team’s own measurements of
H0 have invariably landed closer than Riess’ to the theoretical
prediction, implying that the Hubble tension may not be real.
Since the Webb telescope started taking data in 2022, the
astrophysics community has awaited Freedman’s multipronged
analysis using the telescope’s observations of three types of
stars. Now, the results are in: Two types of stars yield H0
estimates that align with the theoretical prediction, while the
third—the same type of star Riess uses—matches his team’s
higher H0 value.
Disponível em https://wired.com/. 08 Sep 2024. Adaptado.
De acordo com o texto, a abordagem metodológica da equipe
de Adam Riess¬
