Patches of dust block out the light as it travels towards us, preventing us from seeing the stars behind it, and smaller tendrils of dust create
the dark filamentary structures within the clouds.
Not exact matches
This
dark matter
filamentary structure is thought to be a progenitor of large scale structures in the Universe.
The surface intensity shows the sunspot with the
dark central umbra surrounded by the somewhat brighter,
filamentary penumbra.