Simplify the following text for a Grade 8 native English-speaking person.
Original: The Delisle scale ( Â D ) is a temperature scale invented in 1732 by the French astronomer Joseph-Nicolas Delisle ( 1688 -- 1768 ) .
Simplified: The Delisle scale is a scale to measure temperature . It was introduced by French astronomer Joseph-Nicolas Delisle in 1732 .