Answer:
Use in astronomy
Explanation:
Unit Definition Distance
light-second 2.998×10 to the 5 power km
light-minute 60 light-seconds 1.799×107 km
light-hour 60 light-minutes = 3600 light-seconds 1.079×10 to the 9 power km
light-day 24 light-hours = 86400 light-seconds 2.590×10 to the 10 power km hope this helps you :)
