![]() That piece of information is very important because, billions of years later, we don’t exactly know how galaxies became how they are today. Now we can separate those areas from where stars already existed. Michael Maseda: The fact that we see hot, ionized gas is telling us exactly where stars are being born in these galaxies. What is important for people to know about these Webb observations? We spoke with Christina Williams (NSF’s NOIRLab), Sandro Tacchella (University of Cambridge), and Michael Maseda (University of Wisconsin-Madison) to learn more about the first observation of the Hubble Ultra Deep Field through Webb’s eyes. Image Credit: NASA, ESA, CSA, Joseph DePasquale (STScI), Christina Williams (NSF’s NOIRLab). Download the full resolution from the Space Telescope Science Institute. It includes 1.8-micron light shown in blue, 2.1-micron light shown in green, 4.3-micron light shown in yellow, 4.6-micron light shown in orange, and 4.8-micron light shown in red (filters F182M, F210M, F430M, F460M, and F480M). The Webb image observes the field at depths comparable to Hubble – revealing galaxies of similar faintness – in just one-tenth as much observing time. This image of the Hubble Ultra Deep Field was taken by the Near-Infrared Camera on NASA’s James Webb Space Telescope. The general observer program (GO 1963) focused on analyzing the field in wavelengths between approximately 2 and 4 microns. 11, 2022, NASA’s James Webb Space Telescope spent over 20 hours observing the long-studied Hubble Ultra Deep Field for the first time. Editor’s Note: This post highlights data from Webb science in progress, which has not yet been through the peer-review process.
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