John Glenn
/ˌdʒɒn ˈɡlen/
/ˌdʒɑːn ˈɡlen/
- (1921-2016) a US astronaut and politician. He joined the NASA Mercury program in 1958 and was the first American to complete an orbit (= circular path in space) of the earth, in the spacecraft Friendship 7. Glenn left NASA two years later and was elected a Senator from Ohio for the Democratic Party until 1998. He twice tried but failed to become the Democratic candidate for US President. In 1998 he again took part in a space flight, at the age of 77.
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John Glenn