A doubly-peaked quasar microlensing event in the lensed Twin Quasar Q0957+561 A , B ( Colley and Schild 2003 ) is analysed within several lensing models .
In the most realistic model a lens resolves in image B the ellipse shaped , bright inner rim of the quasar ’ s accretion disk , intersecting it twice .
This lens weighs 0.5 Earth mass and is located inside the Galaxy , at 3 kpc distance .
During the passing , it partially occults the source , which allows to describe it as a primordial gas cloud of 1.4 Solar radius and 17 K temperature , in accordance with the theory of Gravitational Hydrodynamics .
Lensing by such objects against the Magellanic Clouds and Galactic centre will also lead to occultation dips .