Answer:
Quakers: Though a small religious movement, the Society of Friends (Quakers) organized relief and advocated rescue in Europe before, during, and after the Holocaust.
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Yiddish: Language spoken by many Jews in Eastern Europe; a combination of German, Hebrew and dialects of the countries in which Jews were living.
OR
Yom Kippur: Day of Atonement and a time for repenting and fasting.
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Zyklon B: A chemical developed as an insecticide, the pellets of which were shaken down an opening in the euphemistically called “shower rooms,” or gas chambers. The Nazis found this to be a quicker, cheaper and more reliable method of mass killing than carbon monoxide.
OR
Zionism: Political and cultural movement calling for the return of the Jewish people to their Biblical home.
His Statement is saying that even though the History of Astronomy is down and marked forever,The people that helped or created something for them to discover is due the same credit.