tyhjiöiden
Tyhjiöiden is a Finnish term that refers to voids or empty spaces, typically used in the context of cosmology when describing large underdense regions in the cosmic web. The word is the genitive plural form of tyhjiö, meaning vacuum, and it signifies the collective set of such voids rather than a single entity. In cosmological studies, tyhjiöiden are critical for understanding the large-scale structure of the universe, as they occupy a considerable fraction of cosmic volume and influence the distribution of galaxies, dark matter, and cosmic radiation.
In the late 1990s and early 2000s, extensive surveys such as the Sloan Digital Sky Survey (SDSS)