The James Webb Space Telescope Reveals Its First Images
The largest space telescope ever built peers further back in cosmic time than any instrument before it
Quick facts
- Launch date
- 25 December 2021
- Launch site
- Europe's Spaceport, French Guiana
- Partners
- NASA, European Space Agency, Canadian Space Agency
- First images released
- 12 July 2022
What happened
The James Webb Space Telescope launched on 25 December 2021 aboard an Ariane 5 rocket from Europe's Spaceport in French Guiana, a joint mission of NASA, the European Space Agency, and the Canadian Space Agency. After a 29-day journey of roughly a million miles to reach the second Lagrange point, followed by months of mirror alignment and instrument calibration, NASA released the telescope's first full set of full-color images and spectroscopic data on 12 July 2022, at a live event streamed from Goddard Space Flight Center. Built to solve mysteries in our solar system, look beyond to distant worlds around other stars, and probe the mysterious structures and origins of our universe, Webb's early observations demonstrated its reach across exoplanet atmospheres, distant galaxies, stellar birth regions, and supermassive black holes.
Why it matters
Webb's infrared-optimized mirror, the largest ever flown in space, lets astronomers see light from galaxies far more distant, and therefore far older, than Hubble could resolve, extending direct observation closer to the earliest galaxies formed after the Big Bang. Its instruments were also built specifically to analyze the atmospheres of exoplanets in detail, turning Mayor and Queloz's 1995 discovery of the first sun-like star's planet into a mission capable of studying such worlds' chemistry directly.
How we know
Webb's launch and first-image release were both broadcast live and documented in NASA's own mission records and press releases, and its subsequent scientific observations are published through peer-reviewed astronomical journals and NASA's public image and data archives.
Sources
- NASA Science. Webb's Launch · Reputable sourcescience.nasa.gov · The domain "science.nasa.gov" is on our Reputable source registry. · Link is live and its text matches the event's key terms (Jul 2026)
- NASA. NASA Reveals Webb Telescope's First Images of Unseen Universe · Reputable sourcenasa.gov · The domain "nasa.gov" is on our Reputable source registry. · Link is live and its text matches the event's key terms (Jul 2026)
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Related timelines
- Space Exploration → · Webb's launch and deployment sit within the broader history of international space agency collaboration; see the Space Exploration timeline for NASA, ESA, and other agencies' parallel missions.