July 20 marks the 50th anniversary of the Apollo 11 moon landing. While NASA and private space companies have their sights set on Mars, many believe a trip back to the moon is an essential first stop. NASA hopes to send a manned mission to the lunar surface by 2024. According to The Planetary Society, NASA's 2019 budget was $21.5 billion, or .5 percent of the U.S. government's budget.

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