You have it in reverse. Scientific notation is useful for measuring stars.
Scientific notation is useful in economics to compute very large or very small numbers.
It is a statement about the utility of scientific notation.
Scientific notation is useful in mathematics because it makes very large or very small numbers easier to compute.
Scientific notation is useful in today's world in a few ways. It help with studies and help finding issues.
Scientific notation is useful for representing very large and very small numbers in a simple and manageable way.
Scientific notation is useful to represent numbers which are very large or very small.
Scientific notation gives a compact notation, which is especially useful for writing down - and doing calculations with - very large, and very small, numbers.
You use scientific notation when it comes to "too large" or "too small" numbers. The reasons why using scientific notation is useful are that it saves time to do the computation and also that it makes people's life easier to compute values instead of writing them out completely!
Scientific notation is most useful when working with numbers which are very small or very large.
When numbers are tremendously large or small.
When you have a number with a large amount of digits.