Simple facts
What It Is: Hubble Ultra Deep Field Revisited by James Webbspace Telescope
Where is it: Close to the big dipper in the night sky
When shared: August 1, 2025
James Webb Space Telescope (JWST)’s latest Rakurakutak investigation revealed unprecedented, more relaxed and farther objects dating back to the earliest times in the universe. But it stands on the shoulders of the giant. When NASA published Hubble Ultra Deep Field Images in 2004, it surprised the world of astronomy. The composite of 800 images from a total of 11 days of exposure revealed one of the most distant known galaxies in deep images of inconspicuous parts of the night sky.
Currently, JWST is observing the same empty patches of eyes different, and has found another 2,500 objects. Importantly, they are even further away.
JWST’s new take on the Hubble Ultra Deep field, dubbed the Miri Deep Imaging Survey (MIDIS), is the deepest mid-infrared picture of that part of the night sky.
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The extraordinary new image is the result of an observation of nearly 100 hours using the mid-infrared instrument (MIRI) and a near-infrared camera (NIRCAM). This includes hundreds of very red galaxies, some of which could go back to less than a billion years in the Big Bang.
Related: 42 James Webb Space Telescope Images
The core of the composite image has one ultraexposure. Using only one of Miri’s filters, JWST exposed the night sky for 41 hours. The plan was to capture the galaxy in the middle of mid-red light – something neither Hubble nor the human eye could detect – this revealed previously invisible areas of dust and old red stars.
Capturing light at wavelengths beyond the human vision capabilities is always a problem. How can I start watching it? To process such images, you need filters that assign different colors to light of different wavelengths. In this image, galaxies rich in dust and star-forming activity are orange and red, very distant compact galaxies are greenish, and near-infrared galaxies are blue and cyan.
Researchers described images in journal Astronomy and Astrophysics papers, and described transitional videos with slider tools, pan videos, and Hubble Ultra Deep Fields for comparison.
For sublime space images, see Space Photos in this week’s archives.
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