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But how do we know SBW1 is about to blow?
This new Hubble observation isn't without precedent. In 1987, another star with a strikingly similar nebula detonated as a supernova - the famous SN 1987A. From the shape and size of that star's nebulous rings, astronomers knew that the gases were likely stripped from the star 20,000 years earlier. Using the knowledge they accumulated about SN 1987A, astronomers believe that SBW1 is also likely to go supernova as its rings are also approximately 20,000 years old. The nebula rings are analogous to a fuse on a bomb - it's giving us an approximate idea about how long the star's self destruct timer has been set.
PHOTOS: Hubble's Latest Mind Blowing Cosmic Pictures
Although it is tempting to say that SBW1 will explode "any day now," that "day" is measured in cosmic time scales, which could mean tomorrow or a thousand years from now. Still, this dying star will remain the focus for fascinated astronomers for some time to come, just in case its timer does tick to zero.