GENERAL KNOWLEDGE

Detailed explanation-1: -Superclusters can be made up of ten or more clusters of galaxies. There are also areas throughout the universe where very little matter exists. These are huge, spherical areas called voids. Astronomers have begun to think of the universe as having a structure similar to soap bubbles.

Detailed explanation-2: -It is absolutely true that billions of light-years away, there are enormous cosmic voids in space. Typically, they can extend for hundreds of millions of light-years in diameter, and a few of them might extend for a billion light-years in size or even many billions of light-years.

Detailed explanation-3: -Cosmic voids really are devoid of matter. Astronomers have found that even the pervasive ‘dark matter’ which accounts for about 80% of the mass of the universe is not present in these voids, which are areas of vast emptiness in space that can be tens of millions of light-years across.