text:   structures",3,"['New paper with @DjunaCroon, \n@davemckeen, &amp; Zihui Wang! ""Subaru through a different lens"": <LINK> . \nThread follows. For a flash review of gravitational microlensing see my previous thread on it: <LINK>. <LINK>', ""You'd think a star in the Andromeda Galaxy (10^19 km away) would look like a point from here, but so sharp-eyed is the Subaru Telescope that when it looks for the brief dazzle of  starlight bent by a passing object, the star's spatial extent (~10^7 km) actually matters to it! https://t.co/Arn4clsnMc"", 'If the passing object is a dark matter structure such as a subhalo or a boson star, *its* spatial extent -- and unique mass distribution -- must figure in the lensing signal as well. That gives us a brand new constraint to the hunt for #darkmatter. https://t.co/djtQwqiXcP']",20,07,747