There is an area in the universe where there are no nebulae and galaxies. What is it called? I forgot my name! !

There is no separate name for this area, is there? This area has only very low density substances, and it is not completely empty.

For example, there are only about 60 galaxies in a cave with a diameter of about 250 million light years. If it is other space of the same size in the universe, it should be able to accommodate more than 10000 galaxies.

The hole diameter in many galaxies in the constellation Bojiang south of Orion is 65.438+0 billion light years.

In 20 15, a super black hole was discovered, which is a spherical material spanning1800 million light years, and the density of galaxies in it is much lower than the normal area.