Every chapter of James Webb, in sequence.
T+00:00:00
December 25, 2021 · 12:20 UTC
On Christmas morning 2021, an Ariane 5 lifted off from the Guiana Space Centre at Kourou, French Guiana, carrying the most expensive and ambitious science observatory ever built. JWST had been roughly 25 years and approximately $10 billion in development — a joint undertaking by NASA, ESA, and the Canadian Space Agency. The telescope represented the accumulated effort of thousands of engineers and scientists across three continents.
The launch trajectory was so precise that the planned propellant expenditure for trajectory correction maneuvers was far below projections, effectively extending Webb's mission life well beyond its 10-year design goal. Where engineers had budgeted propellant conservatively, the rocket's accuracy handed the mission decades.
T+3 days
December 28, 2021 · 12:00 UTC
Webb was too large to fit inside any rocket fairing in its operational configuration — it launched folded like an origami sculpture and had to deploy itself over two weeks en route to its destination. The sequence involved 344 single-point failures: mechanisms that each had to work perfectly, exactly once, with no crew to intervene and no possibility of repair.
Nothing this complex had ever been deployed in space. Flight controllers in Baltimore monitored every step of the choreography — the pallet deployments, the sunshield mid-booms, the secondary mirror, the primary wing latches — each one a milestone that had never been rehearsed in the thermal and gravitational conditions of deep space. Every deployment succeeded.
T+10 days
January 4, 2022 · 16:00 UTC
Webb's sunshield is five separate layers of a material called Kapton, each thinner than a human hair, that together span an area the size of a tennis court when fully tensioned. Its purpose is to separate two thermal worlds: the Sun-facing side runs near +85 °C, while the telescope side, shielded from every photon of solar and terrestrial heat, cools toward −233 °C — close to absolute zero.
That extreme cold is not a byproduct but a requirement. JWST's instruments are designed to detect infrared light from the first galaxies formed after the Big Bang — heat that has been redshifted by 13 billion years of cosmic expansion into wavelengths that would be drowned out by the observatory's own thermal glow if the telescope were any warmer. The sunshield is the reason Webb can see what it sees.
T+14 days
January 8, 2022 · 18:00 UTC
Eighteen hexagonal beryllium segments, each coated with a microscopically thin layer of gold, unfolded and latched into position to form a primary mirror 6.5 metres across — the largest mirror ever launched into space. Beryllium was chosen because it is both rigid and remarkably light, and remains dimensionally stable at cryogenic temperatures where most metals would warp. Gold, applied at a thickness of about 100 nanometres, maximises reflectivity at the infrared wavelengths Webb is built to capture.
In the weeks that followed, fine-tuning actuators behind each segment adjusted their angles to within nanometres of the ideal parabolic profile. The result was a single coherent mirror with a light-gathering area more than six times greater than Hubble's.
T+30 days
January 24, 2022 · 19:00 UTC
Thirty days after launch, Webb fired its onboard thrusters in a precise insertion burn that placed it into a halo orbit around the second Sun–Earth Lagrange point, approximately 1.5 million kilometres from Earth on the night side of the planet. L2 is four times farther from Earth than the Moon — well beyond reach of any crewed spacecraft or servicing mission.
The Lagrange point is not a fixed location but a gravitational balancing point where a spacecraft can orbit the Sun in synchrony with the Earth, keeping Earth, Moon, and Sun perpetually in the same direction. This allows the sunshield to block all three heat sources simultaneously. Webb arrived, and its first 30 days of anxiety gave way to six months of meticulous mirror alignment and instrument calibration.
T+199 days
July 12, 2022 · 14:30 UTC
On July 12, 2022, NASA released Webb's first full-colour science image: galaxy cluster SMACS 0723, a gravitational lens whose combined mass bends and amplifies light from galaxies far behind it. The result was thousands of galaxies visible in a patch of sky the apparent size of a grain of sand held at arm's length — the deepest infrared view of the universe ever captured to that date, showing light that left its source more than 13 billion years ago.
President Biden unveiled the image at the White House the previous evening; NASA Administrator Bill Nelson presented it as a view of the cosmos the world had never seen before. Four more first-light images followed within hours: the atmospheric spectrum of exoplanet WASP-96b showing clear signs of water vapour, the death throes of the Southern Ring Nebula, Stephan's Quintet in unprecedented infrared detail, and the Cosmic Cliffs of Carina — a star-forming region rendered as a mountainous landscape of gas and dust.
Ongoing
July 13, 2022 · 00:00 UTC
Since first light, Webb has repeatedly rewritten our understanding of the early universe. It has confirmed candidate galaxies formed within a few hundred million years of the Big Bang, detected carbon dioxide and other molecules in the atmospheres of planets orbiting distant stars, imaged stellar nurseries like the Cosmic Cliffs of Carina Nebula in dust-piercing infrared detail, and probed the edges of our own solar system with a precision no previous observatory could match.
The propellant saved at launch means Webb's scientific life now extends beyond 20 years — a generational instrument that will outlast the careers of most of the scientists now using it. Where Hubble revealed the universe in visible light, Webb is reading its chemical biography in infrared: every cloud of gas, every distant galaxy, every alien atmosphere a sentence in a story that was always there, waiting for eyes capable of seeing it.
Sources: NASA — James Webb Space Telescope · Webb Space Telescope (STScI)