Answer:
1) To find Stars
2) To tell the date.
Step-by-step explanation:
1) Constiltions can be used to find stars. For example if you are looking for a speific star, constilations could help you find them. Some of the most recognized constilatitons are Orion, Ursa Major/minor , and Scorpius.
2) Of course now days, we have calenders to keep track of the days. But in the past, people would use the stars to help the figure out the day, especially in ancient times. Now we have so much technology, that using the stars to treack the days, arent necesary, but in ancient times, it helped people figure out when they could plat their crops.