Abstract WD 0810-353 is a white dwarf within the 20 pc volume around Sun. Using Gaia astrometric distance and proper motions, radial velocity derived from spectroscopy, it has been predicted that this star will pass 1 of solar system in about 30 kyr. However, also shown to host magnetic field with strength order MG. Its spectrum therefore not like those normal DA stars similar effective tempera...

A class of metrics with isometry group SO(2, 1) × SO(2) × ℜ is derived. Gödel solution belongs to it , and is the only case corresponding to the stress-energy tensor of a perfect fluid.