Rhythm Cardiovascular Adaptation to Weightlessness
RIGEX Rigidizable Inflatable Get-Away-Special Experiment
RM root module
RNA ribonucleic acid
RNAi ribonucleic acid
rRNA ribosomal ribonucleic acid
ROALD Role of Apoptosis in Lymphocyte Depression
Root
Effects of the Space Environment on the Nuclear Structure and
Functionof Plant Root meristematic Cells Grown in Microgravity
ROS reactive oxygen species
Roscosmos State Space Corporation of Russia
RPA Replication Protein A
RPI Rensselaer Polytechnic Institute
RPM Random Positioning Machine
RPM revolutions per minute
RR inter-beat
RRM Robotic Refueling Mission
RSA respiratory sinus arrhythmia
RSD respiratory sinus dysrhythmia
RTS remote triaxial sensor
rVOR roll-induced vestibulocular reflex
RWV rotating wall vessel
(^)
SAA South Atlantic Anomaly
Sally Ride EarthKAM Sally Ride Earth Knowledge Acquired by Middle School Students
SAME Smoke and Aerosol Measurement Experiment
SAMS-II Space Acceleration Measurement Systems-II
Sarcolab Myotendinous and Neuromuscular Adaptation to Long-term Spaceflight
SARJ solar array rotary joint
SAS space adaptation syndrome
SAT S- Interact Supervision of Autonomous and Teleoperated Satellites - Interact
Saturday Morning
Science Science of Opportunity^
SCE Spinal Cord Excitability
SCN succinonitrile
SDB Surface tension dominated boiling
SDBI Short-duration Biological Investigation
SDL Space Dynamics Laboratory
SDS sodium dodecyl sulfate
SDTO Station Development Test Objective
SeaWiFS sea-viewing wide field-of-view sensor