Outstanding capabilities of James Webb compared with other telescopes

The James Webb Space Telescope is now at the final stage of calibration before it begins to work fully for the benefit of science. But even at the stage of focusing, it has already impressed the scientific community with its capabilities when it sends photos of the remote depths of our cosmos. These test images give an initial idea of how powerful JWST will be and how much infrared astronomy will improve. Engineers say that the optical characteristics of the JWST turned out to be better than the most optimistic predictions, and astronomers are beside themselves with excitement.

James Webb Space Telescope. Photo: Space

Being in an intolerable expectation, astronomers began to publish comparative images of JWST with other telescopes that show the evolution of improving the resolution of the visible cosmos. Astronomer Andras Gaspar, who works with the MIRI mid—infrared instrument on board the JWST, compiled images of the WISE telescope (Wide Infrared Survey Explorer) with the image of the JWST of the same field of view — the Large Magellanic Cloud, a small moon galaxy of the Milky Way. Then it made the same comparison with a photo taken by Spitzer.

Comparison of the same area taken by WISE, Spitzer and JWST

“WISE with its 40 cm telescope is half the size of Spitzer (85 cm). But both are tiny compared to the 6.5-meter giant JWST. That’s what you end up getting with a large aperture — higher resolution and sensitivity!” explains Gaspard.

Astronomers and engineers seem to be amazed at how high the sensitivity of the JWST turned out to be. Other scientists also joined in and shared similar comparisons:

It is expected the first official images from James Webb, taken using all the capacities of the telescope, will appear in July.

Earlier, NASA wanted to rename James Webb due to the ambiguous past of the man in whose honor the telescope is named.

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