Last Updated on May 12, 2026 by Jaspreet Kaur
Astronomers using NASA’s James Webb Space Telescope have made the most detailed map of the cosmic web. This huge structure is like a hidden framework of the universe.
The map was made by researchers from the University of California Riverside. They used data from the COSMOS-Web survey. This is the survey done by the James Webb Space Telescope so far.
The new map shows how galaxies are arranged across the entire history of the universe. It goes back to when the universe was one billion years old.
Scientists say this discovery gives a view of how galaxies formed and evolved over billions of years. They can see how galaxies are connected.
The findings were published in The Astrophysical Journal.
The Cosmic Web
The cosmic web is like a skeleton of the universe. It is made of filaments and sheets of dark matter, gas and galaxies. These stretch across space.
There are empty regions between these filaments. These are called voids. All these structures create a network. This network shapes how galaxies and galaxy clusters form.
Scientists have known about the web for years.. Mapping it has always been hard. This is because distant galaxies are faint and hard to detect.
That changed with the James Webb Space Telescope. Its powerful infrared instruments can see galaxies that are very far away. It can also see through clouds of dust.
Power of COSMOS-Web
Astronomers created the COSMOS-Web project. This is a survey that studies the large-scale structure of the universe.
The survey covers a region of the sky that’s about the size of three full moons. It has observations of hundreds of thousands of galaxies.
Researchers used the survey data to make a map. This map shows how galaxies are distributed across space and time.
The dataset includes information on around 164,000 galaxies. It also has measurements of density and large-scale structures.
The project allows astronomers to track galaxy evolution over 13.7 billion years. This is the entire age of the universe.
Beyond Hubble
Researchers compared the James Webb Space Telescope observations with earlier images from the Hubble Space Telescope. They found an improvement in detail.
Structures that were once blurred are now clearly separated. The sharper observations come from two advantages of the James Webb Space Telescope.
First, it can detect fainter galaxies than Hubble. Second, it can measure galaxy distances accurately.
This allows astronomers to place galaxies into slices of cosmic time. This creates a clearer picture of the universe’s structure.
Open to Everyone
The COSMOS-Web team has decided to release the maps and data. They shared the galaxy catalog and mapping pipeline.
They also shared videos showing how the cosmic web evolved over billions of years. Scientists hope this will allow researchers to study galaxy formation and dark matter in detail.
The project involved researchers from countries. Astronomers believe the new map is a step forward in understanding the universe’s hidden architecture.
The James Webb Space Telescope will continue exploring into space and further back in time. Scientists expect more discoveries about how the universe formed and evolved.
Ancient Lights
Fireflies are cool creatures. They light up summer nights with their glowing flashes. For a time people have been fascinated by their natural glow. Scientists have always wondered how old this glowing ability is.
Now a remarkable discovery has revealed that fireflies were already shining 100 million years ago. This was during the age of dinosaurs.
Researchers studying a beetle trapped inside Burmese amber found what appears to be the oldest confirmed firefly fossil. The study, published in Proceedings of the Royal Society B: Biological Sciences shows that modern glowing fireflies have been much longer than scientists thought.
The discovery suggests that ancient forests of the period may have had glowing insects. Giant dinosaurs still roamed the planet then.
Preserved in Amber
The fossil was found in amber that is around 99 million years old. Amber forms when tree resin hardens over millions of years. Sometimes it perfectly preserves organisms trapped inside.
The beetle fossil was very detailed even though it was a few millimeters long.
Scientists named the species Cretoluciola birmana. They found that it had eyes, long antennae and a special light organ on its abdomen.
This light organ suggests that the insect could glow, like today’s fireflies.
Researchers think the glowing organ was used for communication, finding a mate or warning predators. Modern fireflies use flashing signals for these things too.
The fossil is the confirmed Cretaceous member of the Luciolinae subfamily. This is one of the branches of modern fireflies.
Tracing Evolution
To figure out where the fossil belonged in the firefly family tree scientists studied physical characteristics. They looked at living and extinct fireflies. Examined genetic data from modern species. By combining these datasets researchers created a tree. The fossil clearly fits within the Luciolinae lineage.
The results strongly supported the fossil’s classification as an ancient firefly.
This finding is important because earlier fossils thought to be fireflies were uncertain. Some previous specimens may not have been glowing fireflies.
Cretoluciola birmana provides evidence that modern-style fireflies existed during the mid-Cretaceous period.
The study also shows that the basic firefly body plan and producing system have changed very little over tens of millions of years.
A Stable Glow
One of the surprising discoveries is how advanced the ancient firefly already was.
The fossil’s light organ closely resembles those found in species. This suggests that fireflies blinking communication systems were highly developed 100 million years ago.
Scientists think these insects were likely nocturnal. They used flashes to attract mates or warn predators.
The research highlights how successful this biological design has been. While many species disappeared over millions of years the fireflies’ glowing system survived.
Fireflies are also important to science. The chemical reactions behind their glow are used in medicine, biotechnology and forensic research.
Understanding the origins of these systems could help scientists learn more about how bioluminescence evolved.
More Mysteries Ahead
Although the discovery answers some questions, researchers say many mysteries remain.
The new species is currently known from one fossil specimen. Scientists also note that only a small number of living firefly groups were included in the study.
More fossil discoveries, from amber deposits could help reveal how diverse ancient fireflies were.
Researchers believe Cretaceous forests may have had more glowing beetle species than previously imagined.
For now the discovery offers a glimpse into a nighttime world. Tiny flashes of light may have sparkled beneath giant prehistoric trees while dinosaurs walked nearby.
It is a reminder that some of nature’s familiar wonders have existed far longer than humans ever imagined.