Its almost become expected that many space telescopes and probes can have extended missions. Both Voyagers are still sending data back 40+ years after their 5-year primary mission ended. But figuring out what to do with those spacecraft after their primary mission takes some negotiation. One such craft that will reach its end-of-mission in 2030 is Euclid, which is currently on a mission to map the dark universe of dark energy and dark matter. According to a new paper from Luigi Rolly Bedin of the Astronomical Institute of Padova, which is available in pre-print form on arXiv, for its second act we could turn Euclid into the most powerful astrometric telescope ever made.