The document provides biographical information about multiple famous astronomers and astronauts:
1) Neil Armstrong was the first person to walk on the moon. He was born in 1930 in Ohio and graduated from Purdue University with a degree in engineering.
2) John Glenn was the first American to orbit Earth. He was a naval aviator and test pilot born in 1921 in Ohio.
3) Johannes Kepler was a famous astronomer born in 1571 who made important discoveries about planetary motion and published works on astronomy.