Rainer "Rai" Weiss (; German: [vaɪs]; amụrụ na Septemba 29, 1932) bụ onye America bụ ọkà mmụta sayensị, nke a maara maka onyinye ya na physics gravitational na astrophysics. Ọ bụ prọfesọ emeritus nke physics na MIT na prọfesọ na LSU. A maara ya nke ọma maka ịmepụta usoro laser interferometric nke bụ isi ọrụ nke LIGO. Ọ bụ Onye isi oche nke COBE Science Working Group. Ọ bụ onye otu Fermilab Holometer nnwale, nke na-eji 40m laser interferometer tụọ njirimara nke ohere na oge na ọnụọgụ ọnụọgụ ma nye Planck-ezi ule nke mgbanwe nke holographic quantum. Na 2017, e nyere Weiss Nobel Prize na Physics, tinyere Kip Thorne na Barry Barish, "maka onyinye dị oke mkpa na LIGO detector na nyocha nke ebili mmiri gravitational nke ụlọ akwụkwọ abụọ na-eji ya arụ ọrụ.
MIT na onye prọfesọ na LSU