* Identify the decimal place: 604.0
* Move the decimal point to the left until there's only one non-zero digit to the left of the decimal: 6.04
* Count how many places you moved the decimal: 2 places
* Express the number as a product of a number between 1 and 10 and a power of 10: 6.04 x 10²
Therefore, 604 light years in scientific notation is 6.04 x 10² light years.
