Monitoring the Chandra satellite, which watches for the birth and death of stars, galaxies, and clusters of galaxies. Launched in 1999, it has lasted far beyond its planned lifetime of five years.
X-Ray Vision: A KSJ Tour of Chandra
“The technology may be old, but it’s still the best in class”: an update on the orbiting X-ray telescope, launched by NASA with big assists from MIT and Harvard.