Simplify the following text for a Grade 11 native English-speaking person.
Original: James E. Hansen ( born March 29 , 1941 in Denison , Iowa ) heads the NASA Goddard Institute for Space Studies in New York City , a part of the Goddard Space Flight Center in Greenbelt , Maryland , Earth Sciences Division .
Simplified: James E. Hansen ( born March 29 , 1941 ) heads the NASA Goddard Institute for Space Studies in New York City , a part of the Goddard Space Flight Center in Greenbelt , Maryland , Earth Sciences Division .