James Webb Space Telescope: Greatest Discoveries So Far

The James Webb Space Telescope has transformed our understanding of the cosmos since becoming operational in July 2022. Its infrared sensors detect light from the universes earliest galaxies, formed just 300 million years after the Big Bang. JWST has discovered galaxies that should not exist according to current cosmological models, too massive and too organized for their young age, potentially forcing a rewrite of galaxy formation theory. Its exoplanet atmospheric analysis revealed water vapor, carbon dioxide, and dimethyl sulfide on K2-18b, a possible biosignature.

The telescope has directly imaged exoplanets around nearby stars, mapped the atmospheres of hot Jupiters in unprecedented detail, and observed the most distant star ever detected (Earendel at redshift 6.2). Closer to home, JWST has captured stunning images of Jupiter, Saturn, Neptune, and Uranus in infrared, revealing previously unknown atmospheric features and ring structures. The Pillars of Creation image became one of the most shared photographs in history. With a planned mission lifetime of 10+ years and enough fuel for 20, JWST will continue rewriting textbooks for a generation..