There Is a Mysterious Interstellar Material in the Solar System, and We Know What Is Made of


Across the interstellar space, there are some long streaks of organic material that have unknown origins. Scientists cannot even find their composition. They have been studying the DIBs (“diffuse interstellar bands”) for decades and they have finally found some insight about what they are made of. They have also found them in the Solar System. This is interesting.   

The Solar System is placed in the Local Bubble, which is a cavity in the interstellar medium. The region is found 300 light-years across, and its density if of around one-tenth of the regular interstellar medium. It comes with a lot of hot gas, and it creates harsh conditions for the standard interstellar molecules. However, studies found that it is not the case with DIBs.  

They found them with the help of a 3D map 

Scientists have measured the Local Bubble, and they have looked for two certain DIBs. These two were only described by their wavelengths. There’s a 3D map of the region, and that’s where they discovered that λ5,780 DIB is in there. This means that it must be stable and actually made out of much larger molecules in order to manage to exist with the high temperatures.  

The team can easily see the DIBs in from of distant stars, but they wanted to know if they can also find them closer to home. In order to know it, they need to look nearby at the bright stars. Their aim was to reach at least 1 in 1000. Most astronomers were happy to find one in 100. However, this entire process required very careful observation in processing the data. They made it, and they saw the pattern on DIBs.  

For the first time, scientists have found the material inside the Local Bubble. 


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