ESA/Webb/NASA/CSA
This composite image of nebula NGC 1333 captures minute detail of young stars and brown dwarfs. These details were previously obscured in Hubble Telescope's images of the same nebula.
NASA/ESA/CSA/M. Marin (STScI)
NASA released this image of galaxy Arp 142 on July 12, to mark the two-year anniversary of the James Webb Space Telescope.
NASA, ESA, CSA, STScI, J. Lee (STScI), T. Williams (Oxford), PHANGS Team
This Webb image shows a densely populated spiral galaxy anchored by a central region that has a light blue haze, known NGC 628. It's 32 million light-years away in the constellation Pisces.
NASA/ESA/CSA/ STScI
In this new image of Uranus, the planet shines shine brightly, along with its many rings and moons.
NASA/ESA/CSA/STScI
The James Webb Space Telescope's shot of supernova remnant Cassiopeia A shows elaborate details visible for the first time.
NASA/ESA/CSA/STScI
There are approximately 500,000 stars in this image of the Sagittarius C region of the Milky Way. The bright cyan area contains emissions from ionized hydrogen.
NASA/ESA/CSA/STScI
Galaxy cluster MACS0416 is seen here in exquisite detail thanks to a composite image created with data from both NASA's James Webb and Hubble space telescopes.
NASA/ESA/CSA/STScI/Tea Temim
Scientists are hoping to gain more information about the origins of the Crab Nebula, thanks to new details spotted by the James Webb Space Telescope.
ESA/Webb/NASA/CSA
This image shows the Ring Nebula in exceptional detail, like the filament elements in the ring's inner section.
NASA/ESA/CSA
Earendel, the most distant star ever discovered, can be seen in this image of the Sunrise Arc galaxy.
NASA/ESA/CSA/JWST Ring Nebula Team
The Ring Nebula is seen in breathtaking detail, in a composite image released on August 4.
J. DePasquale/CSA/ESA/NASA
The James Webb Space Telescope captured a high-resolution image of a pair of actively forming stars called Herbig-Haro 46/47. The stellar duo, only a few thousand years old, is located at the center of the red diffraction spikes.
NASA/ESA/CSA/Klaus Pontoppidan, STScI
The James Webb Space Telescope captured a detailed closeup of the birth of sunlike stars in the Rho Ophiuchi cloud, the closest star-forming region located 390 light-years from Earth. The young stars release jets that cause the surrounding gas to glow. The image's release marks the first anniversary of Webb's observations of the cosmos.
NASA
Saturn and its moons were captured by NASA's James Webb Space Telescope June 25. The image shows details of the planet's atmosphere and ring system.
ESA/Webb/NASA/CSA
The James Webb Space Telescope captured the Orion Bar, a part of the Orion Nebula that is being eroded by stellar radiation emanating from the Trapezium Cluster.
NASA/ESA/CSA
This composite image, shot from the James Webb Space Telescope's MIRI and NIRCam instruments, shows the bright clusters of stars and dust from barred spiral galaxy NGC 5068.
NASA/ESA/CSA/STScI
Webb captured a burst of star formation triggered by two colliding spiral galaxies called Arp 220. The phenomenon is the closest ultra-luminous galactic merger to Earth.
NASA/ESA/CSA/A. Pagan/A. Gáspár
Dusty rings surround Fomalhaut, a young star outside of our solar system that's 25 light-years from Earth.
NASA/ESA/CSA/STScI/Webb ERO Production Team
The Wolf-Rayet star WR 124 was one of the James Webb Space Telescope's first discoveries, spotted in June 2022.
NASA/ESA/CSA/D. D. Milisavljevic/T. Temim/I. De Looze
Stunning details can be seen in this Webb telescope photo of supernova remnant Cassiopeia A, which is 11,000 light-years from Earth.
Space Telescope Science Institut/STScI
Webb's image of ice giant Uranus shows off the planet's incredible rings and a bright haze covering its north polar cap (right). A bright cloud lies at the cap's edge and a second one is seen at left.
NASA/ESA/CSA/STScI
The James Webb Space Telescope captured 50,000 sources of near-infrared light in a new image of Pandora's Cluster, a megacluster of galaxies. The cluster acts like a magnifying glass, allowing astronomers to see more distant galaxies behind it.
NASA/ESA/CSA
Stars shine through the hazy material of the Chamaeleon I dark molecular cloud, which is 630 light-years away from Earth.
NASA/ESA/CSA/STScI/A. Pagan
The James Webb Space Telescope spotted NGC 346, one of the most dynamic star-forming regions near the Milky Way, located in a dwarf galaxy called the Small Magellanic Cloud.
NASA/ESA
Two galaxies, known as II ZW96, form a swirl shape while merging in the constellation Delphinus.
NASA/ESA/CSA/STScI
The James Webb Space Telescope revealed features of a new protostar forming.
NASA/ESA/CSA/STScI
The James Webb Space Telescope captured a new perspective of the Pillars of Creation in mid-infrared light. The dust of this star-forming region, rather than the stars themselves, is the highlight, and resembles ghostly figures.
NASA/ESA/CSA/STScI
Webb captured a highly detailed snapshot of the so-called Pillars of Creation, a vista of three looming towers made of interstellar dust and gas that's speckled with newly formed stars. The area, which lies within the Eagle Nebula about 6,500 light-years from Earth, had previously been captured by the Hubble Telescope in 1995, creating an image deemed "iconic" by space observers.
NASA/ESA/CSA/STScI/JPL-Caltech
The two stars in WR140 produce shells of dust every eight years that look like rings, as captured by the Webb telescope.
NASA/ESA/CSA/ASU/UA/UM/JWST PEARLs Team
The James Webb Space Telescope and Hubble Space Telescope contributed to this image of galactic pair VV 191. Webb observed the brighter elliptical galaxy (left) and spiral galaxy (right) in near-infrared light, and Hubble collected data in visible and ultraviolet light.
ESA/NASA/CSA/J. Lee
The James Webb Space Telescope captured spiral galaxy IC 5332, which is over 29 million light-years away. The observatory's MIRI instrument peered through interstellar dust to see the galaxy's "bones."
NASA/ESA/CSA/STScI
Webb captured the clearest view of the Neptune's rings in over 30 years.
NASA/ESA/CSA/PDRS4all
The inner region of the Orion Nebula as seen by the telescope's NIRCam instrument. The image reveals intricate details about how stars and planetary systems are formed.
NASA/ESA/CSA/STScI/Webb ERO Production Team
NASA released a mosaic image of the Tarantula Nebula on Tuesday, September 6. The image, which spans 340 light-years, shows tens of thousands of young stars that were previously obscured by cosmic dust.
NASA/ESA
A new image of the Phantom Galaxy, which is 32 million light-years away from Earth, combines data from the James Webb Space Telescope and the Hubble Space Telescope.
NASA/ESA/CSA/Jupiter ERS Team
NASA released an image of Jupiter on Monday, August 22, that shows the planet's famous Great Red Spot appearing white.
NASA/ESA/CSA/STScI
The James Webb Space Telescope captured the Cartwheel galaxy, which is around 500 million light-years away, in a photo released by NASA on August 2.
NASA/ESA/CSA/STScI
Webb's landscape-like view, called "Cosmic Cliffs," is actually the edge of a nearby, young, star-forming region called NGC 3324 in the Carina Nebula. The telescope's infrared view reveals previously invisible areas of star birth.
NASA/ESA/CSA/STScI
The five galaxies of Stephan's Quintet can be seen here in a new light. The galaxies appear to dance with one another, showcasing how these interactions can drive galactic evolution.
NASA/ESA/CSA/STScI
This side-by-side comparison shows observations of the Southern Ring Nebula in near-infrared light, left, and mid-infrared light, right, from NASA's Webb telescope. The Southern Ring Nebula is 2,000 light-years away from Earth. This large planetary nebula includes an expanding cloud of gas around a dying star, as well as a secondary star earlier on in its evolution.
NASA/ESA/CSA/STScI
President Joe Biden released one of Webb's first images on July 11, and it's "the deepest and sharpest infrared image of the distant universe to date," according to NASA. The image shows SMACS 0723, where a massive group of galaxy clusters act as a magnifying glass for the objects behind them. Called gravitational lensing, this created Webb's first deep field view of incredibly old and distant, faint galaxies.

A version of this story appeared in CNN’s Wonder Theory science newsletter. To get it in your inbox, sign up for free here.

CNN  — 

A record-breaking water plume erupted from Saturn’s moon Enceladus, and the James Webb Space Telescope was watching when it occurred.

Beneath the thick, icy crust of Enceladus is a global saltwater ocean. Previous missions like Cassini have spied plumes jetting for hundreds of miles between cracks — dubbed “tiger stripes” by scientists — in the ocean world’s surface. The geyser-like plumes release water vapor, organic chemicals and ice particles into space.

But the plume witnessed by the Webb telescope spanned more than 6,000 miles (9,656 kilometers), which is nearly the distance between Los Angeles and Buenos Aires, Argentina, according to a NASA release. A study detailing the finding has been accepted for publication in the journal Nature Astronomy.

NASA/ESA/CSA/STScI/G. Villanueva/A. Pagan
The James Webb Space Telescope captured a a water vapor plume jetting from the south pole of Enceladus. The inset image, taken by the Cassini orbiter, shows how small Enceladus appears compared with the water plume.

“When I was looking at the data, at first, I was thinking I had to be wrong. It was just so shocking to detect a water plume more than 20 times the size of the moon,” said lead study author Geronimo Villanueva, a planetary scientist at NASA’s Goddard Space Flight Center in Greenbelt, Maryland, in a statement. “The water plume extends far beyond its release region at the southern pole.”

Enceladus is a tiny moon, only about 4% the size of Earth and measuring 313 miles (503.7 kilometers) across. But it’s one of several intriguing ocean worlds in our solar system where scientists think they have the best chance of finding life beyond Earth. Although the global ocean exists beneath an ice shell, the moon’s rocky core may warm the ocean enough to make it habitable for life, if it exists there.

Webb’s detailed detection of the plume revealed that the water vapor was releasing from Enceladus at about 79 gallons (299 liters) per second — enough to fill an Olympic-size swimming pool in a couple of hours, which would take more than two weeks on Earth using a garden hose, according to the release.

NASA/ESA
This artist's concept of Comet 238P/Read shows the main belt comet sublimating—its water ice vapourising as its orbit approaches the Sun. This is significant, as the sublimation is what distinguishes comets from asteroids, creating their distinctive tail and hazy halo, or coma. The NASA/ESA/CSA James Webb Space Telescope's detection of water vapour at Comet Read is a major benchmark in the study of main belt comets, and in the broader investigation of the origin of Earth's abundant water. [Image description: Illustration, close up of rocky body of a comet with detailed, cratered surface. Glowing rays emanate from the rocky surface like sunlight through clouds, representing water ice being vapourised by the heat of the Sun.]

Webb telescope spots water in rare comet

“The orbit of Enceladus around Saturn is relatively quick, just 33 hours. As it whips around Saturn, the moon and its jets are basically spitting off water, leaving a halo, almost like a donut, in its wake,” Villanueva said. “In the Webb observations, not only was the plume huge, but there was just water absolutely everywhere.”

Saturn’s water supply

The fuzzy water halo, called a torus, also happens to be located in Saturn’s widest and outermost ring, called the “E-ring.” Webb’s sensitive instruments collected data that revealed 30% of the water remains within the torus, while 70% escapes and acts as a water supply for Saturn and its 124 moons.

Designing missions to explore Enceladus more rigorously and discover the depth of its ocean is a priority for astronomers. Two missions dedicated to studying Jupiter’s moon Europa, which shares some similarities with Enceladus, will arrive at the icy ocean world at the beginning of the 2030s: NASA’s Europa Clipper mission and the European Space Agency’s Jupiter Icy Moons Explorer mission. And Saturn’s moon Titan, also an ocean world, will be explored by NASA’s Dragonfly mission in 2034.

NASA, ESA, CSA, Joseph Olmsted (STScI)
This artist concept represents the rocky exoplanet GJ 486 b, which orbits a red dwarf star that is only 26 light-years away in the constellation Virgo. By observing GJ 486 b transit in front of its star, astronomers sought signs of an atmosphere. They detected hints of water vapor. However, they caution that while this might be a sign of a planetary atmosphere, the water could be on the star itself -- specifically, in cool starspots -- and not from the planet at all.

Webb telescope detects mysterious water vapor in a nearby star system

In the meantime, Webb will continue to observe Enceladus and gather information that could be helpful for future missions

“Right now, Webb provides a unique way to directly measure how water evolves and changes over time across Enceladus’ immense plume, and as we see here, we will even make new discoveries and learn more about the composition of the underlying ocean,” said study coauthor Stefanie Milam, planetary scientist at NASA Goddard Space Flight Center, in a statement. “Because of Webb’s wavelength coverage and sensitivity, and what we’ve learned from previous missions, we have an entire new window of opportunity in front of us.”