The NASA-sponsored High-Resolution Microcalorimeter X-ray Imaging Rocket (Micro-X) was
launched for the first time in 2019 and successfully completed its second flight in
2022. The Micro-X Sounding Rocket launches an X-ray telescope into space, takes a
spectrometric snapshot of a supernova remnant, then returns to Earth on a parachute and
is recovered for another flight. Micro-X uses an array of 128 superconducting
Transition-Edge Sensors as its detector read out by a 16 X 8 time-division SQUID
multiplexing system. The 2019 Micro-X launch was the first flight of at TES detector and
a SQUID multiplexer in space. A huge challenge for this rocket was launching devices
that operate at 75 mK and have them taking high-resolution X-ray spectra seconds after
surviving 12gs of acceleration during flight. We will overview the mechanical and
electrical design of this rocket payload, the engineering and scientific problems that
were overcome to get it to flight, and the scientific results of this flight program.