When it comes to astronomy, little things like day and night are difficult to fully envision. Sure, scientists have studied the various animal behaviors, weather patterns and Earth’s magnetic field that help us understand our planet’s natural cycles.
However, one question that still lingers in the back of people’s minds is whether or not there is artificial light on Earth at night. Many astronomers believe in a simple answer — yes. They argue that light from cities and metropolitan areas could easily be detected by telescopes stationed above us.