Explanation for Question 43 From the Reading Section on the 2018 May Sat
Question number 43 asks us which choice best supports the conclusion that 2 the first galaxies formed less than 1 billion years after the big bang. 3 So let's take a look. One thing we can do here before we even 4 take a look at our answer choices is kind of just skim for where 5 we see that figure of 1 billion years presented in the passage. 6 Um, and we see that here at the end of this first paragraph, 7 less than a billion years old. So that's a clue that that's kind of 8 the approximate area. We're going to find our answer in, 9 um, if not the exact line that they're looking for. 10 So our answer choices here, we have a lines one to four, 11 B four to eight, C eight to 12 and D 22 to 24. 12 So taking a look first at answer choice, 13 a lines one to four, 14 um, which say that the Hubble space telescope stares billions of light years 15 into the depth of space and billions of years back in time. 16 Um, but this doesn't speak to the big bang and the timing of the 17 creation of the universe. So we can eliminate choice a choice 18 B says, uh, lines four to eight with its extraordinarily sensitive 19 detectors. The Hubble space telescope can witness the peak of star formation 20 at cosmic high noon, which ended about 5 billion years after the big bang. 21 We're not talking about cosmic high noon in this question. 22 So we can eliminate choice B choice C is lines eight through 12, 23 and at the outer limits of its capabilities, we wondered if it could detect 24 the faintest ca...