1. The elapsed time it takes for a signal to travel from Earth to a spacecraft (or other body) and back to the starting point
   - round-trip light time

Type of: elapsed time

Encyclopedia: RTLT

• rivalry
• rive
• river
• River Acheron
• River Adige
• River Aire
• River Arno
• River Avon
• river basin
• river birch
• river blindness
• river boat
• river bottom
• river boulder
• River Cam
• River Cocytus
• river cooter
• river dolphin
• river gum
• river horse
• River Kasai
• River Lethe
• river limpet
• river otter
• river pear