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Webb Telescope unmasks Ring Nebula's cosmic dance
JWST/NIRcam composite image of the Ring Nebula. The images clearly show the main ring, surrounded by a faint halo and with many delicate structures. The interior of the ring is filled with hot gas. The star which ejected all this material is visible at the very centre. It is extremely hot, with a temperature in excess of 100,000 degrees. The nebula was ejected only about 4000 years ago. Technical details: The image was obtained with JWST's NIRCam instrument on August 4, 2022. Images in three different filters were combined to create this composite image: F212N (blue); F300M (green); and F335M (red).
Webb Telescope unmasks Ring Nebula's cosmic dance
by Staff Writers
Manchester UK (SPX) Aug 04, 2023

NASA's James Webb Space Telescope (JWST) has released exquisite new visuals of the famed Ring Nebula, or Messier 57, to the world. The unveiling was done by a global consortium of astronomers, a team steered by Professor Mike Barlow of UCL, UK, Dr Nick Cox of ACRI-ST, France, and with contributions from Professor Albert Zijlstra of The University of Manchester.

The Ring Nebula, a luminous beauty in the Lyra constellation, is no stranger to stargazers. Visible throughout the summer months, even a small telescope will divulge its signature donut-shaped luminescence. This planetary nebula-colorful remnants left behind by dying stars after ejecting a significant portion of their mass-is an enigma that has long enticed human curiosity. The newly captured images by JWST now deliver an unparalleled perspective, enabling a deeper probe into the intricate processes that carved this cosmic marvel.

Albert Zijlstra, an Astrophysics Professor at the University of Manchester, expressed his astonishment, stating, "We are amazed by the details in the images, better than we have ever seen before. We always knew planetary nebulae were pretty. What we see now is spectacular."

The head scientist for the JWST Ring Nebula Project, Dr Mike Barlow, also shared his insights: "The James Webb Space Telescope has provided us with an extraordinary view of the Ring Nebula that we've never seen before. The high-resolution images not only showcase the intricate details of the nebula's expanding shell but also reveal the inner region around the central white dwarf in exquisite clarity. We are witnessing the final chapters of a star's life, a preview of the Sun's distant future so to speak, and JWST's observations have opened a new window into understanding these awe-inspiring cosmic events. We can use the Ring Nebula as our laboratory to study how planetary nebulae form and evolve."

Situated roughly 2,600 lightyears from our home planet, the Ring Nebula was conceived from a star nearing its end, which expelled its outer layers into the cosmos. The sheer diversity of shapes and designs in these nebulae, from elegant radiant rings to expanding bubbles and intricate clouds, is a product of multiple physical processes still not fully grasped. The hot central star's radiance now lights up these layers.

The nebula's various chemical elements produce light in distinct colors, much like fireworks. This not only results in visually enthralling sights but also equips astronomers with the means to meticulously examine the chemical transformation of these entities.

Dr Nick Cox, the project's co-lead scientist, emphasized the scientific significance of these images, noting, "These images hold more than just aesthetic appeal; they provide a wealth of scientific insights into the processes of stellar evolution. By studying the Ring Nebula with JWST, we hope to gain a deeper understanding of the life cycles of stars and the elements they release into the cosmos."

The expert team pouring over these images comprises scholars from various countries including the UK, France, Canada, USA, Sweden, Spain, Brazil, Ireland, and Belgium. They have hinted at forthcoming JWST/MIRI images of the Ring Nebula.

Related Links
University of Manchester
Stellar Chemistry, The Universe And All Within It

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Euclid test images tease of riches to come
Paris (ESA) Aug 01, 2023
Euclid's two instruments have captured their first test images. The mesmerising results indicate that the space telescope will achieve the scientific goals that it has been designed for - and possibly much more. Although there are months to go before Euclid delivers its true new view of the cosmos, reaching this milestone means the scientists and engineers behind the mission are confident that the telescope and instruments are working well. "After more than 11 years of designing and developi ... read more

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