Final answer:
The purpose of Ronald Reagan's Challenger speech was to address the American people and comfort the nation after the space shuttle disaster. Reagan paid tribute to the astronauts and emphasized the importance of space exploration.
Step-by-step explanation:
Ronald Reagan's Challenger speech had the purpose of addressing the American people and comforting the nation after the tragic Challenger space shuttle disaster that occurred in 1986. The speech was aimed at paying tribute to the seven astronauts who lost their lives and offering condolences to their families and friends. Reagan used the speech to emphasize the importance of space exploration and the bravery and dedication of the astronauts who risked their lives in pursuit of scientific knowledge and progress.