Use of Martian resources in a Controlled Ecological Life Support System (CELSS)
Use of magnetic sails for advanced exploration missions
Use of lunar regolith as a substrate for plant growth
Use of Ketoprofenate and Xanthonate Photocages for Antiviral Release
Use of Data Mining for Root Cause Analysis of Traffic Accidents in Colombia
Uranus Probe Entry and Descent Mission Concept
Upcoming Lunar Mission Landing Sites: Viewing and Analysis with Celestial Mapping System
Understanding the organization of the amphibian egg cytoplasm - Gravitational force as a probe
Uncertainty in estimates of the number of extraterrestrial civilizations
Uncertainty Assessment of Hypersonic Aerothermodynamics Prediction Capability
Uncertainties in radiation effect predictions for the natural radiation environments of space
Ulysses - The first high-latitude heliospheric mission