Hubble completes its 200,000th orbit around Earth

NASA's Hubble Space Telescope completed its 200,000th Earth orbit on September 19 after 36 years and more than 1.7 million observations. A milestone-day exposure monitors supernova Athena, magnified by galaxy cluster MACS J0417. Light from the same explosion follows different paths and is predicted to reappear between now and early March 2027. The timing can map the cluster's mass and improve measurements of the Hubble Constant.