1. The problem statement, all variables and given/known data What range of values of right ascension would be best for viewing stars at a latitude of -32 degrees, 20 arcmins, 10 arcseconds on September 21st? What about an observer at 45deg22arcm11arcs? 2. Relevant equations N/A 3. The attempt at a solution On these dates the Sun would be approximately at 0 hours of right ascension in southern hemisphere as it is the vernal equinox. Because of this, between 0hrs and 6hrs of right ascension will be blocked by the sun as well as 18 to 24 hours. Thus between 7 hours of right ascension and 17 hours would be best for viewing the stars at this date. For northern hemisphere, 6-18hrs are blocked by the sun, therefore 0-5hr and 19-24hr are best for viewing. I am not sure if I am on the right track here or not and how to get more precise based on the degree of latitude?