NASA's flagship astrophysics observatories are reshaping our understanding of the cosmos by tackling fundamental questions about dark matter, dark energy, exoplanets, and the early universe. The James Webb Space Telescope, now in its second year of operations, continues delivering unprecedented infrared observations of distant galaxies and stellar nurseries. Meanwhile, the Nancy Grace Roman Space Telescope, scheduled to launch in the coming years, will complement JWST with wide-field imaging capabilities and the capacity to detect potentially habitable exoplanets around distant stars.
These missions represent the cutting edge of NASA's astrophysics program. JWST's infrared sensors peer through cosmic dust to reveal star formation processes hidden from visible-light observatories. Roman will survey vast patches of sky simultaneously, enabling discoveries of supernovae, gravitational lensing events, and planetary systems that would take traditional telescopes years to find individually.
The combination of observatories addresses interconnected mysteries. JWST characterizes the chemical composition and atmospheres of exoplanet candidates. Roman identifies those candidates and maps their locations across the galaxy. Together, they advance the search for biosignatures in exoplanet atmospheres. JWST's observations of the universe's first galaxies inform theoretical models that Roman will test with its own deep-field surveys.
Dark energy and dark matter remain among astrophysics' greatest unknowns, comprising 95 percent of the universe. Both observatories contribute data through weak gravitational lensing measurements and observations of distant supernovae that trace the universe's expansion history. These measurements refine models of cosmic expansion and the nature of dark energy itself.
The observatories also enable time-domain astronomy. Transient events like supernovae, gamma-ray bursts, and stellar flares reveal physics under extreme conditions. Roman's rapid survey capability will detect transients that ground