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☆ Webb telescope spies giant plume on Saturn’s moon Enceladus
  + stars: | 2023-06-01 | by ( Ashley Strickland | ) edition.cnn.com   time to read: +4 min
CNN —A record-breaking water plume erupted from Saturn’s moon Enceladus, and the James Webb Space Telescope was watching when it occurred. 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. 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.
Persons: James Webb, Cassini, —, Webb, . Villanueva, ”, Geronimo Villanueva, ” Villanueva, “, NASA’s, Stefanie Milam, we’ve Organizations: CNN, NASA, James Webb Space, Cassini, ESA, CSA, Goddard Space Flight, Saturn, Clipper, NASA Goddard Space Flight Locations: Los Angeles, Buenos Aires, Argentina, Greenbelt , Maryland
☆ Webb telescope spots water in rare comet
  + stars: | 2023-05-15 | by ( Ashley Strickland | ) edition.cnn.com   time to read: +5 min
CNN —Astronomers used the James Webb Space Telescope to observe a rare comet in our solar system, making a long-awaited scientific breakthrough and stumbling across another mystery at the same time. For the first time, water was detected in a main belt comet, or a comet located in the main asteroid belt between the orbits of Mars and Jupiter. The space observatory detected water vapor around Comet Read, which suggests that water ice can be preserved in a warmer part of the solar system. It’s possible that the warmer temperatures of the main asteroid belt cause Comet Read to lose its carbon dioxide over time, the researchers said. Comet Read might have also formed in a warmer pocket of the solar system without carbon dioxide, Kelley said.
☆ Explainer: What to expect during the green comet's encounter with Earth
  + stars: | 2023-01-30 | by ( Joey Roulette | ) www.reuters.com   time to read: +3 min
Nicknamed "dirty snowballs" by astronomers, comets are balls of ice, dust and rocks that typically hail from the ring of icy material called the Oort cloud at our solar system's outer edge. One known comet actually originated outside the solar system - 2I/Borisov. Comets are composed of a solid core of rock, ice and dust and are blanketed by a thin and gassy atmosphere of more ice and dust, called a coma. Its greenish, emerald hue reflects the comet's chemical composition - it is the result of a clash between sunlight and carbon-based molecules in the comet's coma. NASA plans to observe the comet with its James Webb Space Telescope (JWST), which could provide clues about the solar system's formation.
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