25 December 2021–12 July 2022 CE · launch, commissioning and first science-image release · Global · Science

James Webb Space Telescope

Webb launched on an ESA-provided Ariane 5 from French Guiana on 25 December 2021, unfolded and aligned its segmented mirror near the Sun–Earth L2 region and completed commissioning before its first public science images and spectra were released in July 2022.

Atlas dossier · Present Day

Free device narration · synchronized English captions · transcript available

Why it matters

Its infrared instruments study early galaxies, star and planet formation, exoplanet atmospheres and Solar System objects. Webb complements rather than replaces other observatories, and its colour images are documented translations of measured wavelengths—not unaided human-eye views or photographs of the Big Bang.

Date: 25 December 2021–12 July 2022 CE · launch, commissioning and first science-image release
Historical setting: Present Day · Global
People & communities: NASA · ESA · Canadian Space Agency · Space Telescope Science Institute · Arianespace · instrument and mirror teams · engineers · operators · astronomers · archive and image-processing teams

Launch was the start of commissioning

Webb launched on 25 December 2021 on an Ariane 5 supplied as part of ESA's contribution. The folded observatory then deployed its sunshield and segmented mirror, travelled toward the Sun–Earth L2 region, aligned optics and calibrated four instruments. July 2022 images therefore mark completed commissioning, not instant science at launch.

NASA: Webb mission timeline ↗

An international observatory, not one agency's camera

NASA leads Webb with ESA and the Canadian Space Agency. Spacecraft, launch, instruments, detectors, mirrors, operations and analysis came from institutions and workers across countries. Scientific results also depend on competitive observing proposals, data calibration, archives and peer review.

NASA: James Webb Space Telescope ↗

Infrared measurements become interpretable images

Webb detects wavelengths largely beyond human vision. Published colour views combine calibrated exposures and assign visible colours to filters so structures and composition can be studied. They are evidence-rich translations, not what an unaided nearby eye would see and not direct photographs of the Big Bang.

NASA: Webb's first images ↗

Illustrated sequence

A visual presentation accompanying this entry. Read each image’s attribution to distinguish archival records, later depictions and reconstructions.

IMAGE 1

Visual record

Rights-cleared archival or official image · Public domain

James Webb Space Telescope Mirror37.jpg — NASA/MSFC/David Higginbotham/Emmett Given; Public domain; via Wikimedia Commons

Source and reuse terms ↗

Interpretation note

Evidence, memory and historical debate

This dossier distinguishes the event’s basic chronology from later arguments about meaning, responsibility and legacy. When comparing religious, national, Indigenous or scholarly interpretations, consult the primary and institutional sources above alongside peer-reviewed historical work.

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