<span> is the volume of fluid which passes per unit time; usually represented by the symbol Q (sometimes V̇).</span>
If you mean climate change. Then scientists can study it by seeing where places and things are eroded.
Star 1 - 4 hours right ascension
Star 2 - 3 hours right ascension
Subtracting hours right ascension
4 hours right ascension - 3 hours right ascension = 1 hours right ascension.
Thus,
star 1 will rise 1 hour before star 2
Explanation:
What exactly are u looking for?