The author most likely asks "remember Aristarchus" to connect earlier information about Aristarchus to the new idea being introduced. This choice (option 4) suggests that the mention of Aristarchus's ideas about a heliocentric model is relevant to understanding the current discussion on the sun-centered solar system.
Read the excerpt from Chapter Two of Windows to the Universe: Revolutions in Astronomy.
In this model, the sun was at the center of the solar system, and Earth, along with other planets, orbited around it (this idea was revolutionary, but it wasn't brand new—remember Aristarchus?).
Why does the author most likely ask "remember Aristarchus"?
to create a transition between the discussion of historical models and new contributions
to emphasize the importance of revisiting prior knowledge to understand ideas
to remind the reader that Aristarchus was mentioned in the previous chapter
to connect earlier information about Aristarchus to the new idea being introduced option 1 2 3 or 4
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