The Roman telescope will see 100 times more sky than Hubble

This changes the scale of the work. Instead of individual beautiful shots, it becomes possible to build enormous maps of galaxies: where they are, how they move, how the Universe’s large-scale structure is organized. Such surveys are needed to better understand dark matter—substance that provides gravity but does not shine—and dark energy, linked to the accelerated expansion of space. One of the techniques being developed, including at the University of Arizona, is kinematic lensing: images are combined with spectra to measure distortions of spacetime more precisely.

A separate instrument is the coronagraph. It suppresses a star’s light to see very faint objects nearby. According to estimates, Roman will be able to distinguish planets about 100 million times fainter than their star. This is orders of magnitude better than current space-based coronagraphs and a step toward a future observatory of habitable worlds.

For now, this is not a ready catalog of discoveries but the promise of an instrument. But if it works as intended, astronomy will gain not yet another “improved Hubble,” but a machine for mass imaging of the sky.

Sources:

1. University of Arizona. "NASA’s Roman telescope will see 100 times more sky than Hubble." ScienceDaily (28 August 2026).
2. Materials from the University of Arizona and NASA on the Nancy Grace Roman Space Telescope mission.