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

• antenna
• calligraphical
• calligraphist
• calligraphy
• Callimorpha
• Callimorpha jacobeae
• Callinectes
• Callinectes sapidus
• calling
• calling card
• calling into question
• calling together
• Callionymidae
• calliope
• Calliophis
• calliopsis
• calliper
• Calliphora
• Calliphora vicina
• Calliphoridae
• callipygian
• callipygous
• Callirhoe
• Callirhoe digitata
• Callirhoe involucrata