Labels:text | screenshot | font | number OCR: LIGHT YEAR A LIGHT YEAR is the distance traveled by a light beam through a vacuum in 1 year. This distance is about 9,461 billion km (6,713 billion miles). In 1 second, light travels about 300,000 km (186,000 miles), which is equal to about seven times the Earth's circumference. The parsec (pc) is the most commonly used unit of distance in astronomy. It is equivalent to 3.26 light years.
