J-2X may do 500-second burn

STENNIS SPACE CENTER, Miss. - It's not an official objective, but the J-2X rocket engine being test fired at NASA's Stennis Space Center in South Mississippi Wednesday may fire for 500 seconds. The media has been invited to see the test, and officials from several NASA centers also will be there, according to the Huntsville (Ala.) Times. The J-2X, which will power the upper stage of the heavy-lift rocket NASA is developing, has already been tested at SSC, but not for the duration that would occur during a space mission. (Source: Huntsville Times, 11/07/11)