Discovery retires having logged more than 148 million miles in orbit during 39 flights . 1984 : The shuttle landed just before noon ET . Discovery 's first launch was August 1 , 1984 . Discovery has traveled more than 148 million miles in orbit .
1984 : The shuttle landed just before noon ET . Discovery 's first launch was August 1 , 1984 . Discovery has traveled more than 148 million miles in orbit .