Mysterious Star

There is a candidate for the most mysterious star in our galaxy. It is truly unique in that there are a great number of things which block its light on a regular cycle. If it were a young star, this could be explained as dust and debris left over from the star formation. But it isn't young. Over time gravity consolidates this stuff into planets which block comparatively little light. This behavior is truly anomalous. Out of 150,000 stars studied for potential exo-planets, this is the only one that has this much blockage.

Perhaps we have found our first Dyson sphere. Could it be that an alien civilization is in the process of constructing large structures in orbit around a star to capture its energy?