The EarthSky Lunar Calendar 2026 is now available. Get yours today! It’s a great gift.
The iconic Ring Nebula harbors a mysterious iron rod, study finds
Astronomers from University College London (UCL) and Cardiff University have discovered a mysterious rod-shaped iron cloud inside the iconic The Ring Nebula.
A cloud of iron atoms, described for the first time in Monthly Notices of the Royal Astronomical Society (RAS) 16 January 2026 is rod or streak-shaped and fits only within the inner layer of the oval-shaped nebula.
The length of the bar is roughly 500 times the length of Pluto’s orbit around the Sun, and its mass is comparable to that of Mars.
How did it come about? It’s a mystery, astronomers say.
Discovering a hidden cloud in the Ring Nebula
French astronomer Charles Messier first spotted the Ring Nebula in 1779. Located in the northern constellation Lyra the Harp, it is a colorful shell of gas ejected by a star as it ends its phase of life burning nuclear fuel. Our own sun will expel its outer layers in a similar manner in a few billion years.
Researchers discovered the iron plume using the Large Integrated Field Unit (LIFU) mode of the new tool, WHT Enhanced Area Velocity Explorer (CUSTODY), installed on the 4.2 meters (13.7 ft) Isaac Newton Group William Herschel’s telescope.
A LIFU is a bundle of hundreds of optical fibers. This allowed a team of astronomers to obtain spectra (where light is split into its fundamental wavelengths) at every point across the entire surface of the Ring Nebula and at all optical wavelengths, for the first time.
Lead author Dr. Roger Wessonbased jointly at UCL and Cardiff University, he said:
Although the Ring Nebula has been studied with many different telescopes and instruments, WEAVE has allowed us to observe it in a new way that provides much more detail than before.
By acquiring spectra continuously across the entire nebula, we can image the nebula at any wavelength and determine its chemical composition at any position.
As we processed the data and sifted through the images, one thing jumped out as clearly as nothing: this previously unknown “stripe” of ionized iron atoms in the middle of the familiar and iconic ring.
What made this iron rod?
How the iron rod came to be is currently a mystery, the authors say. They’ll need more, more detailed observations to figure out what’s going on. There are two possible scenarios: first, the iron bar may reveal something new about how the nebula was ejected by the parent star. Or, more interestingly, the iron may be an arc of plasma formed by the vaporization of a rocky planet trapped in the star’s earlier expansion.
Co-author Professor Janet Drewalso based at UCL, he said:
We definitely need to know more – especially whether any other chemical elements coexist with the newly detected iron, as that would likely tell us the correct class of model to follow. We are missing this important information right now.
The team is working on a follow-up study and plans to acquire higher-resolution data with WEAVE’s LIFU to better understand how the streak could have formed.
Learn more
WEAVE is conducting eight surveys over the next five years, targeting everything from nearby white dwarfs to very distant galaxies. The Stellar, Circumstellar and Interstellar Physics string of the WEAVE survey observes many more similar ionized nebulae across the northern Milky Way.
Dr. Wesson he explained:
It would be very surprising if the iron rod in the Ring was unique. So hopefully, as we observe and analyze other nebulae formed in the same way, we will discover more examples of this phenomenon that will help us understand where the iron came from.
Professor Scott TragerWEAVE Project Scientist based at the University of Groningen, added:
The discovery of this fascinating, previously unknown structure in a gem of the night sky beloved by northern hemisphere sky watchers demonstrates the amazing capabilities of WEAVE.
We look forward to many more discoveries from this new tool.
Bottom line: Scientists have discovered a mysterious iron rod hidden in the iconic Ring Nebula. It is not yet clear what created it.
Source: WEAVE imaging spectroscopy NGC 6720: an iron bar in a ring
Read more: Messier objects are blurry spots in the night sky
Leave a Reply