What might a giant space bubble be made of?
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In one of the most empty regions of space between the galactic superclusters there is a giant space bubble, with a radius of about 1,000,000 light years. Most of this bubble is one molecule thick although parts of it are two molecules thick as molecules stick to the base layer of molecules of this space bubble. This bubble is made of a flexible material or materials that can stretch, and compress.
What might this bubble be made of?
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