China launches its first ever X-ray space telescope
China launched its first-ever X-ray space telescope, also its second space telescope, on Thursday to study the evolution of black holes. The 2.5-tonne telescope was sent into an orbit of 550 km above Earth. The telescope would also help scientists study how to use pulsars (fuel-exhausted rotating stars) for spacecraft navigation, and look for gamma-ray bursts corresponding to gravitational waves.