![]() ![]() The red objects in this field are enshrouded in thick layers of dust, and may very well be distant galaxies. This means that their stars are older – there is less gas and dust available to condense to form new stars. These galaxies contain stars, but very little dust. If an object is blue and lacks spikes, it’s a galaxy. Stars also appear yellow, sometimes with green diffraction spikes. Find more stars by looking for these telltale – if tiny – spikes. At right, it has very long diffraction spikes, but in mid-infrared at left, its smaller points appear more like a snowflake’s. Start by comparing the largest bright blue star. Compared to Webb’s near-infrared image at right, the galaxies and stars are awash in new colors. Galaxy cluster SMACS 0723 is a technicolor landscape when viewed in mid-infrared light by NASA’s James Webb Space Telescope. Other objects are only visible in one view. Some objects, like the bright stars, galaxies, and arcs appear in both images at the same locations. There are also many thin, long, orange arcs that curve around the center of the image. ![]() Most stars appear blue with long diffraction spikes, forming eight-pointed star shapes. Some galaxies are shades of orange, while others are white. They are sharper and more distinct than what is seen in the mid-infrared view. Thousands of galaxies and stars appear all across the view. The near-infrared image appears busier, with many more points of light. The galaxies are less focused and more blobby than what is seen in the near-infrared view. Galaxies and stars also appear in a range of colors, including blue, green, yellow, and red. Stars have very short diffraction spikes. The mid-infrared image appears much darker, with many fewer points of light. The background of space is black in both images. ![]() Webb’s mid-infrared image is shown at left, and Webb’s near-infrared image on the right. Thus, the photos of the two telescopes complement each other in an amazing way, allowing astronomers to learn more about the structure and stellar population of IC 5332.Įarlier we talked about how JWST photographed the rings of Neptune.This frame is split down the middle. This can be explained by the fact that some of them glow brighter in the ultraviolet and visible, and others in the infrared range. You can notice that the two images depict different stars. At the same time, we also see a lot of complex intertwining structures that are invisible in the Hubble photo, which complement the spiral arms of IC 5332. Therefore, the dust areas in the JWST image are not dark at all. At the same time, the dust transmits infrared radiation. It absorbs visible light, which is why dusty areas look dark. In the Hubble photo, you can see a lot of dark areas in the galactic disk. Lee and the PHANGS-JWST and PHANGS-HST Teams For a more visual demonstration, it should be compared with the image taken by the Hubble Space Telescope in the visible and ultraviolet range.Īn image of the galaxy IC 5332 taken by the James Webb Telescope. The JWST image of the galaxy IC 5332 demonstrates some of the possibilities of shooting in the mid-infrared range. It cools MIRI to a record temperature of -266 ☌, allowing it to conduct observations. The only way out is to install an active cooling system capable of cooling the instrument sensors to a temperature close to absolute zero. Putting a telescope into space is not a panacea in itself, because the heat it emits will simply “make noise” the entire channel. Radiation at these wavelengths is almost completely absorbed by the Earth’s atmosphere. The mid-infrared range is extremely difficult to observe. It was obtained using the MIRI instrument, capable of taking pictures in the mid-infrared range at wavelengths from 5 to 28 microns. The image taken by JWST demonstrates unprecedented details of the internal structure of IC 5332, which are beyond the power of any other telescope. Lee and the PHANGS-JWST and PHANGS-HST Teams Difficulties of taking pictures in the mid-infrared range An image of the galaxy IC 5332 taken by the James Webb telescope. This object is located at a distance of 29 million light-years from Earth in the direction of the constellation Sculptor. It demonstrates the spiral galaxy IC 5332. The presented image was taken by the James Webb Space Telescope (JWST). ![]()
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