![]() ![]() ![]() "As a by-product, VASCO has the potential to discover rare extremely-variable objects. ![]() A Dyson sphere is a hypothetical giant structure surrounding a star to harness its energy. Other physical indicators of ETI activity that the authors are looking for are signs of red interstellar communication lasers and Dyson spheres. Indeed, the only non-ETI (extra-terrestrial intelligence) explanation for a vanishing star would be exceedingly rare events called "failed supernovae." A failed supernovae is theoretically predicted to occur when a very massive star collapses into a black hole without any visible explosion. A vanishing star can be an example of an "impossible phenomenon" that could be attributed either to new astrophysical phenomena or to extra-terrestrial activity. ![]() When a star dies it either undergoes very slow changes and becomes a white dwarf or it dies with a sudden bright explosion i.e. "Finding an actually vanishing star-or a star that appears out of nowhere- would be a precious discovery and certainly would include new astrophysics beyond the one we know of today," says project leader Beatriz Villarroel, Stockholm University and Instituto de Astrofísica de Canarias, Spain. ![]()
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