Two of humanity's most powerful space telescopes have peered into a dense ball of stars that is essentially a fossil from the Milky Way's chaotic early days. NASA's Webb and Hubble telescopes together revealed new details about this relic cluster, offering a sharper look at a structure that has survived since our galaxy was still taking shape.
A crowded snow globe of ancient stars
The object in question is a globular cluster, a tightly packed spherical collection of hundreds of thousands of stars. Located in the Milky Way, this particular cluster is so dense with stars that images from Webb and Hubble show it resembling a just-shaken snow globe. The black background of space is covered by thousands of tiny white, orange, and blue points of light, with stars most concentrated in the center forming a roughly circular orb. Several larger orange stars near the edges of the frame show prominent diffraction spikes, a signature of Webb's optics.
What the telescopes found
By combining observations from both telescopes, astronomers were able to study the cluster's stellar population in greater detail than ever before. The data revealed the history of the cluster's formation and evolution, showing how it has changed over billions of years. The cluster is considered a relic of the Milky Way's formation because it contains some of the oldest stars in the galaxy, preserving information about the conditions that existed when the galaxy was first assembling. The research was conducted by scientists using NASA's Webb and Hubble space telescopes, with findings published through NASA's science mission directorate.
Why this matters to people on Earth
For astronomers and space enthusiasts in the United States and around the world, this cluster offers a direct window into the past. Globular clusters are like time capsules. They hold stars that formed before the Milky Way took its current spiral shape, before most of the galaxy's gas and dust had settled into the disk we see today. By studying this relic, scientists can test their models of how galaxies form and evolve. The collaboration between Webb and Hubble also demonstrates how two different observatories can work together to see more than either could alone. Webb's infrared vision cuts through dust, while Hubble's sharp optical view captures fine details. Together, they have given researchers a clearer picture of one of the galaxy's oldest surviving structures.
This cluster has been there since before the Sun existed. It has orbited the center of the Milky Way for billions of years, outlasting countless generations of stars that have since burned out. Now, thanks to two telescopes built decades apart, humans can finally read its story.
