gasonly ; explicit sequence

https://youtu.be/c7s_j5M57e8

https://youtu.be/Nzt0QiIqKro

Interspersed among superclusters are large voids of space where few galaxies exist. Superclusters are frequently subdivided into groups of clusters called galaxy groups and clusters.
Although superclusters are supposed to be the largest structures in the universe, according to the Cosmological principle, larger structures have been observed in surveys, including the Sloan Great Wall


supercluster, a group of galaxy clusters typically consisting of 3 to 10 clusters and spanning as many as 200,000,000 light-years. They are the largest structures in the universe. ... Abell—as the Local Supercluster, a flattened collection of about 100 groups and clusters of galaxies including the Local Group.

Many ancient cultures around the world have independently discovered and formulated inks for the purposes of writing and drawing. The knowledge of the inks, their recipes and the techniques for their production comes from archaeological analysis or from written text itself. The earliest inks from all civilizations are believed to have been made with lampblack, a kind of soot, as this would have been easily collected as a by-product of fire.[5]
Ink was used in Ancient Egypt for writing and drawing on papyrus from at least the 26th century BC.[6]Egyptian red and black inks included iron and ocheras a pigment, in addition to phosphate, sulfate, chloride, and carboxylate ions; meanwhile, lead was used as a drier.[7]


Ink is a gel, sol, or solution that contains at least one colourant, such as a dye or pigment, and is used to color a surface to produce an image, text, or design. Ink is used for drawing or writing with a pen, brush, reed pen, or quill.