corresponding to the time when one star completely eclipses or is encompassed by the other. You should also note that the eclipse depths (the decrease in light level) are much smaller in this system. Whereas Example 1 dropped to a normalized flux of 0.5 during eclipse, the minimum flux here is about 77% of the peak value when both stars are completely visible. However, in both of these examples the eclipse depths for both eclipses are the same. Use the vertical red cursor to advance the system to a phase of 0.03. What is the physical significance of this phase? Set the system to Example 2. This system is very similar to Example 1 except that one star is now twice as big as the other. Note that the eclipses now have flat bottoms corresponding to the time when one star completely eclipses or is encompassed by the other. You should also note that the eclipse depths (the decrease in light level) are much smaller in this system. Whereas Example 1 dropped to a normalized flux of 0.5 during eclipse, the minimum flux here is about 77% of the peak value when both stars are completely visible. However, in both of these examples the eclipse depths for both eclipses are the same. Use the vertical red cursor to advance the system to a phase of 0.03. What is the physical significance of this phase? The smaller star is about to move fully in front of the larger star (beginning of maximum eclipse depth) The larger star is about to move out from behind the smaller star (end of maximum ecli