This illustration shows NASA’s Imaging X-ray Polarimetry Explorer (IXPE) spacecraft, at lower left, observing the newly discovered binary system Swift J1727.8-1613 from a distance. At the center ...
A good example is X-ray Polarimetry Mission (IXPE), which opened up for the very first time observations of X-rays through polarization so that we could really look into the physics of black holes.