What makes the subject of star formation so difficult and complex? star formation is too expensive to study in detail. stars live too long to be observed from birth to death. shock waves disrupt the orderly evolution of stars. it is so slow that no visible proof of it exists. clouds, fragments, protostars, stars, and nebulae all interact and influence each other.

Stars live to long to be observed from birth to death

Explanation:

The life expectancy of a star are millions of years compared to that of human thereby making it difficult to study the life path and activities of the stars till the point of extinction. This brought about scientist studying different star with different ages in order to answer their burning question on formation of stars which is called the figuring out process(stellar activity) and this makes it difficult and tedious.

in physics zero. in muscle fatigue could be high