Consider Arius the brightest star visible from Earth which is located 4.2 light-years away. Let's assume that Pxima S is one of Saturn's moons. Dr. Alex and his team, are interested in constructing an observatory building on Pxima S in order to determine if Saturn is orbiting the sun. Determine what practical obstacles might prevent this experiment from succeeding if the size of the moon is not an issue.

• A. There are no challenges; it's entirely feasible.
• B. The presence of other stars between Pxima S and the Sun hinders the process.
• C. The strong brightness of the Sun overwhelms the faint light reflected by Saturn.
• D. Saturn is brighter than the Sun, so it's not feasible.

Answer: (C)