Why do I need to use a flashlight with a red light to view stars?
You heard a meteor shower will be visible where you live and are excited to go to your first stargazing event. You grab extra layers of warm clothes, hot chocolate, and the flashlight from the junk drawer in your kitchen. But did you check to see if that flashlight has a red light option? White lights from flashlights, cell phones, or vehicle headlights can harm your night vision. A red light is much better for stargazing because it won't impact your (and others) night vision as much.
Source: U.S. Department of the Interior, National Park Service
