Simplify the following text for a Grade 10 native English-speaking person.
Original: Christian Heinrich Friedrich Peters ( September 19 , 1813 â `` July 18 , 1890 ) was a German-American astronomer , and one of the first to discover asteroids .
Simplified: Christian Heinrich Friedrich Peters ( September 19 , 1813 â `` July 18 , 1890 ) was a German-American astronomer , and one of the first to find asteroids .