light second

ریشه

Derived from 'light', from Old English 'leoht', and 'second', from Latin 'secunda' meaning 'secondly'.

مثال

• Light from the moon reaches us in just over a light second.
• A light second is a measure used in astronomy.
• The spacecraft was several light seconds away from Earth.

ترکیب‌های رایج

Measure in light seconds Travel a light second Light second away