A New Way to Measure the Universe Using Invisible Gas and Radio Bursts

By Space.Fan Editorial DeskSeptember 26, 2026 at 8:00 PM UTC

Scientists have found a powerful new method to weigh the universe by combining space telescopes with fast radio pulses from distant galaxies.

The Drop

Everything in the universe is made of matter, but much of it is hidden in the form of gas between galaxies. This gas, called baryonic matter, is hard to see and moves in ways that scientists do not fully understand. Researchers want to map this gas to learn more about how the universe grew and how heavy neutrinos are, which are tiny particles that are very difficult to detect. To do this, they have designed a new study that uses two different types of tools working together. The first tool is a future space telescope called the CSST, which can observe how light from distant s bends around unseen matter. This effect is known as weak lensing. The second tool involves detecting fast radio bursts (FRBs), which are powerful flashes of radio waves from across the universe. By tracking how these radio waves travel through space, scientists can learn about the gas they bump into along the way. By putting these two sets of data together, the team believes they can get a much clearer picture of the universe's invisible ingredients than if they used just one telescope alone. They used complex computer models to test this idea, showing that this method could be up to ten times more precise than previous approaches.

Why It Matters

Understanding where this invisible gas is located is a major goal for cosmologists. It helps them solve the mystery of how galaxies formed and changed over billions of years. By pinpointing the density of this gas, scientists can also get a better estimate of the mass of neutrinos. Neutrinos are some of the most mysterious particles in physics, and knowing their mass would help us understand why the universe looks the way it does today.

The Catch

This research is based on simulations and models, not yet on actual observations from these upcoming telescopes. While the math shows this approach is very promising, it relies on the hardware performing exactly as designed. If the telescopes have unexpected noise or technical issues, the accuracy of the measurements could be lower than predicted.

Put That in Perspective

Scientists have been trying to map the universe's missing matter for a long time. Combining light-based measurements with radio-based measurements is a new strategy that relies on the next generation of powerful instruments, like the Square Kilometre Array, which will soon provide a much sharper look at the deep cosmos.

Source September 26, 2026

ApJ

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