Weak gravitational lensing: invisible dark matter revealed through coherent galaxy shapes. Based on Scognamiglio et al. (Nature Astronomy, Jan 2026), who used JWST's COSMOS-Web survey to create the most detailed dark matter map ever — 800,000 galaxies, 2...

Gravitational microlensing: an invisible object reveals itself by bending starlight. Based on Dong et al. (Science, 2026), who measured a rogue planet's mass for the first time using stereoscopic parallax between Earth and the Gaia spacecraft. A Saturn-mas...