"Bill Nye Breaks Down the Universe's Immense Scale with Light-Years"
Bill Nye explains that a light-year is the distance light travels in one year, which is 5.88 trillion miles. The vastness of space led astronomers to create manageable units of measurement. A light-year can be broken down into smaller units like a light day, hour, minute, etc. Understanding the meaning of a light-year is important for space exploration and answering big questions about the universe.