Which pair is described as 'sisters of the sun' in the material?

Which pair is described as 'sisters of the sun' in the material?

• A. Cecilia Payne and Annie J. Cannon
• B. Marie Curie and Lise Meitner
• C. Hypatia and Caroline Herschel
• D. Ada Lovelace and Grace Hopper

Answer: (A)

The idea being tested is recognizing a pair of women famous for studying stars and their composition, earning them a title that links them to the Sun. Annie Jump Cannon helped build the system that classifies stars by their spectra, showing how their surfaces differ in temperature and features, with the Sun serving as a reference point. Cecilia Payne-Gaposchkin used spectroscopic analysis to reveal that stars are mostly hydrogen and helium, demonstrating that the Sun’s composition isn’t unique but typical among stars. That combination—classifying stars by their spectra and uncovering their Sun-like chemical makeup—paints them as sisters of the sun. The other pairs are notable in related fields (radioactivity, historical astronomy figures, or computing) but not described in this way as a duo tied to the Sun.

The idea being tested is recognizing a pair of women famous for studying stars and their composition, earning them a title that links them to the Sun. Annie Jump Cannon helped build the system that classifies stars by their spectra, showing how their surfaces differ in temperature and features, with the Sun serving as a reference point. Cecilia Payne-Gaposchkin used spectroscopic analysis to reveal that stars are mostly hydrogen and helium, demonstrating that the Sun’s composition isn’t unique but typical among stars. That combination—classifying stars by their spectra and uncovering their Sun-like chemical makeup—paints them as sisters of the sun. The other pairs are notable in related fields (radioactivity, historical astronomy figures, or computing) but not described in this way as a duo tied to the Sun.