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In July 2022, the James Webb Space Telescope focused its infrared lens on the vast expanse of the universe, with Jupiter being among the first objects of its scrutiny. Astounding astronomers, the space observatory not only exceeded expectations with its breathtaking images, but it also unveiled an unprecedented phenomenon within the atmosphere of this colossal gas giant.
Utilizing Webbs Near-Infrared Camera, or NIRCam, researchers captured a sequence of Jupiter images with a 10-hour interval, implementing four different filters to identify variations in the atmosphere of the planet. Infrared light, imperceptible to the human eye, allowed the Webb telescope to document an array of novel celestial attributes in the past year, including vast clusters of young stars and unforeseen associations of planet-like entities.
During their observations, astronomers detected a swift jet stream in Jupiter's lower stratosphere, a layer around 25 miles (40 kilometers) above the cloud cover. Spanning over 3,000 miles (4,800 kilometers) in width and positioned along the planet's equator, this jet stream moves at a staggering speed of 320 miles per hour (515 kilometers per hour), equivalent to twice the sustained wind velocity of a Category 5 hurricane on Earth.
The study findings, made possible by Webbs sensitive capabilities, shed light on the dynamic interactions within Jupiters stormy atmosphere.
Since ancient times, humans have pondered the existence of extraterrestrial life while gazing up at the night sky. Presently, scientists have identified various locations within our solar system that may possess the necessary conditions for life. Among these intriguing environments is Europa, one of Jupiter's moons, harboring an underground ocean of liquid water that could potentially be twice the volume of all the Earth's oceans combined. Nevertheless, there remained uncertainty regarding whether Europa's ocean contained essential compounds for life, particularly carbon, which serves as the fundamental building block for life as we understand it. Thankfully, utilizing the advanced James Webb Space Telescope, astronomers have now detected the presence of carbon on Europa's surface, most likely originating from this vast ocean. This remarkable finding suggests the existence of a potentially habitable environment within Europa's ocean.
Webb makes a remarkable discovery: a crucial element for life on Jupiter's moon Europa. Ricardo Hueso, the study's lead author and a physics lecturer at the University of the Basque Country in Bilbao, Spain, expresses his astonishment at the finding. The study was published in the journal Nature Astronomy on October 19.
"What we have always seen as blurred hazes in Jupiters atmosphere now appear as crisp features that we can track along with the planets fast rotation," he said.
Jupiters wild weather
Jupiter, the largest planet in our solar system, stands in stark contrast to Earth as it is predominantly composed of gases. However, despite these differences, Jupiter possesses a complex, layered atmosphere similar to our own. Previous missions and telescopes have diligently observed these turbulent layers in order to gain a deeper understanding of the intricate interplay between different atmospheric components. Remarkably, these layers also house various weather patterns, encompassing century-spanning storms like Jupiter's iconic Great Red Spot and clouds consisting of icy ammonia.
In this image captured on December 30, 2020, Juno spotted lightning striking near Jupiter's north pole.
NASA/JPL-Caltech/SwRI/MSSS
NASA's spacecraft has captured an image of eerie lightning on the surface of Jupiter. Unlike other missions, Webb has the advantage of studying the upper layers of the planet's clouds, specifically at altitudes ranging from 15 to 30 miles (25 to 50 kilometers) above the cloud tops. This enables it to uncover previously unclear features.
Study coauthor Imke de Pater stated that while various ground-based telescopes, as well as spacecraft like NASAs Juno and Cassini, and NASAs Hubble Space Telescope have observed the changing weather patterns of the Jovian system, Webb has already yielded new discoveries regarding Jupiters rings, satellites, and atmosphere. Specifically, jet stream revelations have been made.
In order to detect the jet stream on Jupiter, researchers compared winds detected at high altitudes by Webb with winds within the lower layers picked up by Hubble. By tracking changes in wind speed, they were able to observe the development of storms. Both space observatories played a crucial role in this discovery, with Webb identifying small cloud features and Hubble providing a view of the equatorial atmosphere, including storms unrelated to the jet stream. Together, these telescopes offered valuable insights into the complex atmosphere of Jupiter and the processes occurring within its various layers.
"The combination of Webb's and Hubble's different wavelengths allowed us to not only reveal the three-dimensional structure of storm clouds, but also to study the rapid development of storms," stated Michael Wong, a planetary scientist at the University of California, Berkeley, who led the Hubble observations associated with the study.
Future observations of Jupiter using the Webb telescope could potentially reveal additional information about the jet stream's behavior, including any temporal variations in its speed and altitude. These observations may also bring to light other unexpected discoveries.
/CSA James Webb Space Telescope has made a significant discovery in its study of main belt comets. By detecting water vapor at Comet Read, the telescope has achieved a major milestone in understanding the origin of Earth's water. This artist's concept of Comet 238P/Read showcases the sublimation of its water ice as it gets closer to the Sun, giving rise to its distinct tail and hazy coma. [Image description: Close-up illustration of a rocky comet body with detailed craters. Glowing rays emanate from the surface, symbolizing the vaporization of water ice caused by the Sun's heat.]
Study coauthor Leigh Fletcher, a professor of planetary science at the University of Leicester in the United Kingdom, expressed amazement at the discovery of water in a rare comet by the Webb telescope. Despite years of observing Jupiter's clouds and winds, this finding highlights the ongoing potential for new discoveries, such as the hidden jet captured in the new NIRCam images from 2022.
Jupiter exhibits a complex yet consistent pattern of winds and temperatures in its equatorial stratosphere, located above the clouds and hazes observed at these wavelengths. If the intensity of this newly discovered jet is linked to this oscillating stratospheric pattern, we can anticipate significant variations in the jet's strength within the next 2 to 4 years. It will be truly thrilling to validate this theory in the upcoming years.