The James Webb Space Telescope has taken a stunning image of Uranus that showcases 11 of the planet’s 13 rings. Made of rocks and dust that don’t reflect much sunlight, Uranus’ rings are not easy for most telescopes to pick up.
How many rings does Uranus have? The planet has 13 known rings, and 11 of them are visible in this new image, though some of them appear to merge into a larger ring.
The rings of Uranus are difficult for us to see from Earth because they are very thin and dark. When people think of planets with rings around them the first one that comes to mind is Saturn. However, Saturn is not the only planet with rings in our solar system.
Uranus has never looked better. Really.— NASA Webb Telescope (@NASAWebb) April 6, 2023
Only Voyager 2 and Keck (with adaptive optics) have imaged the planet's faintest rings before, and never as clearly as Webb’s first glimpse at this ice giant, which also highlights bright atmospheric features. https://t.co/aE3rJIqVKy pic.twitter.com/RZElIRkudl
The social media post highlighted the photo’s rarity, both in quality and quantity. Previously, only two other photos have shown the planet’s rings.
The first came from the spacecraft Voyager 2 back in January 1986, according to NASA’s Jet Propulsion Laboratory. During its time in Uranus’ orbit, Voyager 2 transmitted thousands of images that showcased two new rings and 11 new moons orbiting the planet.
Next came images from the Keck Observatory in Hawaii with its high-tech telescopes in 2004. According to scientists from the observatory, the astronomers were able to use “advances in Keck adaptive optics to help make major scientific discoveries regarding the planet’s atmosphere and ring system.”
But, even with the best technology of the time, those images of Uranus’ rings cannot compare with the ones from James Webb Space Telescope.
One of the photos released by NASA provides a zoomed-out look at the planet surrounded by six of its known 27 moons.
Astronomer Stefanie Milam called the new photos “breathtaking” in a video posted on the Museum of Science Twitter account.
“The first time I saw this image, it was absolutely emotional,” she said.
“Breathtaking” new images of Uranus just released from the @NASAWebb telescope show its rings more clearly than we’ve ever seen. #JWST scientist @SNMilam on why this image hit home for her🔭 pic.twitter.com/KvqqeDz5vG— Museum of Science (@museumofscience) April 7, 2023
What makes Uranus’ rings hard to see, according to Milam and other astronomers, is their composition of ice and dust. The images sent from the Webb telescope use a combination of infrared camera filters to provide the clearest images of the planet’s rings ever seen.
Still, even with infrared technology, only 11 of Uranus’ 13 known rings can be seen in these images, according to a press release from ESAWebb.org.