Is dusk fully dark?
Dusk is also known as astronomical twilight. Once the Sun drops farther than 18 degrees below the horizon, it's officially fully dark. As this final stage of twilight passes, all the remaining light fades from the sky until it's completely dark.
Dusk is also known as astronomical twilight. Once the Sun drops farther than 18 degrees below the horizon, it's officially fully dark. As this final stage of twilight passes, all the remaining light fades from the sky until it's completely dark.