Astronomers are winding back the clock on the expanding remains of a nearby, exploded star. By using NASA’s Hubble Space Telescope, they retraced the speedy shrapnel from the blast to calculate a more accurate estimate of the location and time of the stellar detonation.
![](https://scx1.b-cdn.net/csz/news/tmb/2021/4-researchersr.jpg)
Source:
https://phys.org/news/2021-01-rewind-clock-age-site-supernova.html