Launch from Cape Canaveral (KSC); landing on Cape Canaveral (KSC).

Spacelab-J - a joint NASA and National Space Development Agency of Japan (NASDA) mission using a manned Spacelab module - conducted microgravity investigations in materials and life sciences. The international crew, consisting of the first Japanese astronaut (Mohri) to fly aboard the Shuttle, the first African-American woman (Jemison) to fly in space and, contrary to normal NASA policy, the first married couple to fly on the same space mission (Lee and Davis), was divided into red and blue teams for around the clock operations. Spacelab-J included 24 materials science and 20 life sciences experiments, of which 35 were sponsored by NASDA, 7 by NASA and 2 collaborative efforts.

Materials science investigations covered such fields as biotechnology, electronic materials, fluid dynamics and transport phenomena, glasses and ceramics, metals and alloys, and acceleration measurements. Life sciences included experiments on human health, cell separation and biology, developmental biology, animal and human physiology and behavior, space radiation, and biological rhythms. Test subjects included the crew, Japanese koi fish (carp) and their vestibularsystem, cultured animal and plant cells, chicken embryos, fruit flies, fungi and plant seeds, and frogs and frog eggs.

Twelve Get Away Special (GAS) canisters (10 with experiments, 2 with ballast) were carried in the payload bay. Middeck experiments were: Israeli Space Agency Investigation About Hornets (ISAIAH), Solid Surface Combustion Experiment (SSCE), Shuttle Amateur Radio Experiment (SAREX II), Air Force Maui Optical Site (AMOS), and Ultraviolet Plume Imager (UVPI).

The ISAIAH experiments showed, that hornets were unable to built honeycombs in weightlessness.

Mission duration was extended for one day, to complete all planned experiments.