Side-by-side: Roman, Hubble, JWST, and Euclid compared on mirror size, field of view, wavelength, orbit, and science goals — with a full comparison table.
The Nancy Grace Roman Space Telescope launches in September 2026. It will map 100× more sky than Hubble per snapshot, hunt dark energy, and photograph's next great observatory.
Dark matter and dark energy make up 95% of the universe, yet nobody has directly detected either. Here's the evidence, the leading theories, and what Euclid and DESI are finding.
