eclipses and coronae

The recent conjunction of a lunar eclipse with a winter solstice, the last such occurrence taking place 372 years ago, allowed some scientists to view the earth's bioprint as they studied the fluctuations in the shadow it cast on our nearest astral neighbour.

This might lead one to search for similar flux in distant stars, as proxies for habitable (M class in any case) worlds.  For example, if one watched the corona of Arcturus for a century, one could mark the transit of various objects should these fall in the same plane as ours.  A stemming question would be, do the orbitals of other systems follow the galactic plane?  This would be a most useful thing to check in our proposed study.

Other activity around the corona might include the space traffic of more intelligent life forms, which may be more erratic than a simple elliptical orbit.  The corona of the star would presumably be a place where such transits would be more highly discernible, as the background is in the twilight between the blazing more central regions, and the vast blackness beyond.