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Ignoring the Earth's motion around the Sun, calculate the relative longitudinal position of the active region with respect to the central solar meridian. Is the region on or off the solar disk in 30 days, i.e., if flares go off, will they be "visible" by the Earth's atmosphere?

2. None given. I found an equation that is identified as the "Differential Rotation Law", given by omega(theta) = A + Bsin^2(theta) + Csin^4(theta). The wording of the constants is confusing. A = 2.897, B = −0.339, and C = −0.485

μrads^-1 for magnetic features. I don't know if that is saying A, B and C are all in μrads^-1 or if just C is. I don't even know if this is the right equation.

3. I can't do the first part! I can't visualize it geometrically. What does it mean for it to be 15 deg offset? Isn't that just longitude? What is meant by RELATIVE longitude? ARGH! I need help fast. Please!