Astronomers at the European Space Agency (ESA) used the James Webb Space Telescope to capture an image of a spiral galaxy that resembles our home, the Milky Way.
). The space agency described it as a mere calibration image to “verify the telescope’s capabilities as it was prepared for science operations.” ESA astronomers snapped it on May 22, 2022, with the Webb telescope’s Near InfraRed Camera .
That ultra-powerful camera can detect longer infrared wavelengths produced by light from this far away. Redshifting describes the stretching of light’s wavelength as it moves away from us, increasing until it appears redder than expected. It occurs because of the universe’s expansion: Distant systems like LEDA 2046648 keep moving farther from Earth.
Most of the visible blobs surrounding LEDA 2046648 are also galaxies, although several stars can be discerned by their diffraction spike patterns. Some objects in the image could be as old as 300 million years after the Big Bang. Of course, an image of anything one billion light-years away means we’re viewing the galaxy’s light from a billion years ago.
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