Simplify the following text for a Grade 7 native English-speaking person.
Original: The landing site of the unmanned Mars Pathfinder spacecraft was renamed the Carl Sagan Memorial Station on July 5 , 1997 .
Simplified: The landing site of the unmanned Mars Pathfinder spacecraft was renamed the Carl Sagan Memorial Station in honor of Dr. Sagan on July 5 , 1997 .