![]() However, the telescope follows a large orbit around that point so that the actual distance ranges from 1.5 M km all the way to ~1.7 M km.īesides taking pictures of amazing stars and galaxies, what other types of data does the telescope collect? The L2 point is 1.5 million km away (just short of 1 million miles). The sensitivity in the red gives it overlap with Hubble. JWST is sensitive from the red portion of the visible spectrum to the medium infrared. What are the main systems that look out into space? As we know, the telescope sees celestial bodies in infrared but does it see other light spectrums? This concept has been validated over time since none of the JWST science has been "touched" despite having been defined 20 years ago. No, the telescope was designed having in mind certain types of scientific observations that had to be done and could not be done with other telescopes. Now that you have had great success with the JWST, is there anything you would improve or change about the telescope? Other parts that we thought were technologically ready, such as the refrigerator (cry-cooler) meant to keep the mid-infrared detectors cold, ended up being more challenging than we thought but still simpler than the sun shield. The sun shield would be the one I would pick as the big challenge. Instead, the sun shield remained challenging to the end. It turned out that the mirrors were "easier" than we thought, i.e., they were challenging, but our plans were adequate for the challenge. We felt from the start that developing the sun shield and the primary mirrors were the two hardest steps. First of all, there were ten technologies that we knew were not mature when we started, and they were developed to make them ready for flight. This makes it difficult to perfectly assess what is easy and what is hard. The big challenge was that it was something significantly more advanced than anything built previously. What was one big challenge you faced when designing the JWST? This made me a good candidate for becoming mission head when that position was vacated in 2012. In 2008 I became the JWST project scientist at STScI. Later I became an instrument scientist for instruments then under development, such as the Advanced Camera for Surveys (ACS) and later the Wide Field Camera 3 (WFC3). Stiavelli: When I joined Space Telescope Science Institute (STScI) in 1995, I was working on Hubble as an instrument scientist for the WFPC2 camera. How did you come to be head of the James Webb Space Telescope Project? Thank you for being part of our inquiry into the James Webb Space Telescope. ![]() This is the first in a series of articles where we are given a rare look at the person who made the entire project happen with such great success. He spoke candidly about where the project is headed, how it began, and what he sees in the future. Stiavelli, the head of NASA’s James Webb Space Telescope project. NASA released the first set of images from the telescope on July 12.We had the chance to speak to Dr. The Webb telescope will replace the Hubble telescope as NASA's primary view of deep space. The telescope's spectrograph permits NASA to explore galaxies' chemical composition. The telescope has allowed scientists to examine galaxies up to 13.1 billion light-years away. Since it began sending back images this summer, the Webb Space Telescope has captured stunning images across the universe. “I think with NASA’s new space telescope we’re going to learn a lot more about how these stars shape the material between stars and trigger new star formation in galaxies.” “Even though Wolf-Rayet stars are rare in our galaxy because they are short-lived as far as stars go, it’s possible they’ve been producing lots of dust throughout the history of the galaxy before they explode and/or form black holes,” said Patrick Morris, an astrophysicist at Caltech in Pasadena, California, and a co-author of the new study. A Wolf-Rayet star is at least 25 times larger than the sun and nearing the end of its life. ![]() ![]() NASA said the system is called Wolf-Rayet 140 because one of the stars is a Wolf-Rayet star. NASA said the “stars’ orbits bring them together about once every eight years like the growth of rings of a tree’s trunk, the dust loops mark the passage of time.” NASA said its fingerprint-like appearance was due to its solar winds. Recently, the NASA Webb Space Telescope captured images of the binary star system, which gave the appearance of a “fingerprint.” At 5,000 light-years away, Wolf-Rayet 140 is a relatively close neighbor to our solar system. ![]()
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