By comparing infrared observations by NASA's Wide-field Infrared Survey Explorer (WISE) and Spitzer Space Telescope, Britt's team found the star had increased in brightness 100-fold between 2007 and 2010. Only around a dozen stars exhibiting this type of rapid outburst have been recorded, but all were found in dense star-forming regions inhabited by other young stars. These stellar nurseries are hothouses for star formation.
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But CX330 is 1,000 light-years from the nearest star forming region, leaving the researchers to speculate how it ended up by itself in an apparently empty void.
Could it be possible that the star was formed in a star formation region, only for it to be gravitationally slingshot out of the nest? This is highly unlikely as astronomers estimate the star is only a million years old and it is still consuming the gas and dust surrounding it. All lines of inquiry point to the fact the star was born where it is now and hasn't migrated far.
Another idea is that it might not be alone at all and it's with a group of other very faint stars, though there is no observational clues of their existence.
Regardless of its origins, we are very lucky to see the energetic outburst of a young star as this phase is predicted to last only a few years -- a fraction of a moment when considering the millions to billions of years life cycle of a star.
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The last observations of CX330 were taken in 2015 and astronomers hope to check in with the baby star again soon to see whether it is still having a tantrum. By doing so, they hope to refine stellar evolution models. One model of star birth suggests singular stars can be born alone, far from the frenzied star nurseries where many stellar embryos compete for material to grow, sparked by turbulence in an interstellar cloud. If CX330 really is a stellar loner, it could be a unique example of this fascinating star formation model.