) Write a short summary of the passage given in Q4. (A) and suggest a suitable
title. (
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very hard question I am pranit
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Astronomers aren't certain exactly how galaxies formed. After the Big Bang, space was made up almost entirely of hydrogen and helium. Some astronomers think that gravity pulled dust and gas together to form individual stars, and those stars drew closer together into collections that ultimately became galaxies. Others think that the mass of what would become galaxies drew together before the stars within them were created. Astronomers are also refining their techniques of measuring the mass of individual galaxies, such as this 2018 study that used the three-dimensional movements of several galaxies to better narrow down the Milky Way's mass.
Explanation: galaxy is the title
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