Classroom Questions Questions for ‘Night lights have a dark side’ The continental United States at night, as seen from a NASA satellite in 2012. This image shows where there is a lot of artificial light at night. NASA Earth Observatory/NOAA NGDC Share this:FacebookTwitterRedditGoogle ClassroomPrint By Science News for Students July 27, 2017 at 6:21 am Classroom questions are available for free with registration. Learn more Register to access: Client key* E-mail* Log in Already Registered? Enter your e-mail address above.