ISRO AstroSat measures X-ray polarisation of Crab pulsar star in Taurus constellation; all you need to know ISRO AstroSat measures X-ray polarisation of Crab pulsar star in Taurus constellation; all you need to know Accomplishing A Landmark Feat, Indian Space Research Organisation (ISRO) Has Measured The X-ray Polarisation Of The Crab Pulsar (star) In The Taurus Constellation Using The Multi-wavelength Space Telescope AstroSat, The Space Agency Said. News Nation Bureau | Edited By : Nabanita Chakorborty | Updated on: 07 Nov 2017, 08:02:25 PM New Delhi: Accomplishing a landmark feat, Indian Space Research Organisation (ISRO) has measured the X-ray polarisation of the Crab pulsar (star) in the Taurus constellation using the multi-wavelength space telescope AstroSat, the space agency said.