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James Webb Space Telescope

James Webb Space Telescope

Space Observatory

Appears in 2 stories

Stories

The exoplanet revolution: 30 years, 6,000 worlds

New Capabilities

Operational since July 2022

NASA confirmed its 6,000th exoplanet in September 2025, marking a milestone exactly 30 years after astronomers discovered the first planet orbiting a Sun-like star. The tally jumped from 5,000 to 6,000 in just three years—an acceleration driven by space telescopes and AI analysis. Over 8,000 additional candidates await confirmation.

Updated May 19

The K2-18b biosignature hunt

New Capabilities

Operating since 2022, revolutionizing exoplanet atmospheric science

Cambridge astronomers announced they'd found dimethyl sulfide and dimethyl disulfide in the atmosphere of K2-18b—molecules that, on Earth, only life produces. The detection using JWST's mid-infrared instrument hit 3-sigma confidence, meaning a 0.3% chance it's statistical noise. If real, it's the strongest evidence yet of biology beyond our solar system.

Updated May 19