Part 3, p. 50 - 69 Summary

Since their parents both have plans, Will is forced to take Tabby with him and Mi Su to a star party (at which amateur astronomers look out into space) out at French Creek, away from the lights of the city. Later in the party, while he's studying a far-away galaxy and commenting in narration that he and Mi Su both want to be astronomers, he loses track of Tabby. While resentfully looking for her, he hears of a telescope that has sighted the Horsehead Nebula, a unique stellar phenomenon that both he and Mi Su have longed to see for years. Torn between seeing the nebula and searching for Tabby, he realizes he has to find his sister, and eventually does so. As they're returning to where they're supposed to meet Mi Su's mother (who is to take them...