John Nelson is a common name that may refer to various individuals across different fields. One notable John Nelson was an American politician who served in the U.S. House of Representatives during the late 19th century. He was known for his contributions to local governance and community development. Another prominent John Nelson is a well-respected figure in the field of astronomy. He has made significant contributions to the study of celestial bodies and has published numerous papers on the subject. His work has helped advance our understanding of the universe and inspired many aspiring scientists.