Astronomers may have found giant alien 'megastructures' orbiting star near the Milky

[stevebowers]

My first thought was 'super-Saturn', when I first heard about the lightcurve
(the quick advent and slow fade suggests a large ring system seen at one end only).

But there seems to be far too many dips for a simple model like that. How dense could a cloud of Trojan asteroids be, anyway?