Cosmic Voids May Hold the World’s Best Secrets

Nature is disgusted by a vacuum, so the saying goes, but no one told the universe. Space is made up of matter in space—many large voids that have opened up between the dense filaments of matter.

Rather than being empty spaces of little study, these voids may hold answers to some of the continuing mysteries of space, such as the behavior of gravity, the nature of dark energyand the so-called Hubble complexitythe inconsistency of the universe’s expansion has given astronomers a headache for years.

“By having voids, we have the power to solve many interesting cosmic myths,” says Alice Pisani, a research professor of cosmology who works at the Center for Particle Physics in Marseille (CPPM) of the French National Center for Scientific Research. He added that because there is little interference with the material, there is a “significant amount of noise” in terms of what the researchers can see.

The advent of new telescopes and advanced experiments has expanded this field, encouraging a growing group of scientists around the world to specialize in such needs as special astronomical laboratories. Some experts say that we may be living in a very large environment, which can change the way we see nature in different ways.

For space defined by sparseness, voids are becoming the weight of space, where the laws of physics can be clearly observed.

“From an environmental perspective, it’s a very exciting time,” says Pisani.

What Are Cosmic Voids?

After the Big Bang, the universe was a homogeneous soup of tiny particles. But over millions of years, as matter cooled and settled into atoms, the subtle patterns of the cosmic web began to emerge.

Over billions of years, the web has drawn gas clouds, constellations, and other celestial bodies to its scaffolding. As more material is pulled into the web, gaps grow between its threads, creating a gap.

Small “subvoids” can open between clusters of galaxies, where they can last 10 to 20 million light-years. But voids can grow. Much bigger. The Boötes Void, also known as the “Great Nothing,” spans over 300 million light years.

Calling them cosmic voids can be “misleading,” says Pisani, “because we end up thinking that the void means nothing. For example, the Boötes Void has twelve galaxies – although that’s still fewer than the thousands that would be expected in a similar area.”

Because they are void of matter, cosmic objects were not discovered until the late 1970s. Until then, the location of galaxies had been mapped as a 2D space in the sky, but the creation of a 3D map of the distribution of galaxies revealed the shape of the cosmic web for the first time, showing the existence of voids.

In recent years, new telescope surveys have led to an explosion of new empty objects, such as the Dark Energy Survey Instrument (DESI) in Arizona, and the European Union. Euclid’s astronomical observations. The instruments are expected to map more than 100,000 positions in space, providing unprecedented visibility. However, this research will only reveal a small fraction of the millions of things that appear to exist in nature.

“In the last 10 years, the field has evolved a lot with the use of new technologies,” says Nico Schuster, an astrophysicist and environmental scientist at CPPM. “All of this allows us to see more galaxies than we’ve ever seen before, and this allows us to study the universe at a much deeper level, find more galaxies and resolve them better.”