Shape-shifting mirrors on NASA’s new space telescope could unveil Jupiters like our own

2026-07-22 · Source: MIT Technology Review · Field: Science & Research — Space Science & Astronomy, Engineering & Applied Sciences · Depth: Intermediate, medium

Summary

NASA's Nancy Grace Roman Space Telescope, expected to launch as early as August 2026, will feature the first space-bound "active" coronagraph. This instrument uses two deformable mirrors, each with 48x48 actuators capable of deforming by up to 0.5 micrometers in 10 picometer increments, to precisely suppress starlight. This active wavefront control technique is projected to improve exoplanet detection sensitivity by a factor of up to 1,000 compared to current space-based coronagraphs. The telescope also includes a 300-megapixel wide-field camera, capturing images 100 times larger than Hubble's widest exposures at similar resolution. These capabilities will enable direct imaging of Jupiter-like exoplanets, which primarily reflect starlight, and contribute to detecting around 100,000 new exoplanets, while also aiding in dark matter and dark energy research. This mission is a critical step towards future direct imaging of Earth-like worlds.

Key takeaway

For exoplanet research scientists planning future observation programs, the Nancy Grace Roman Space Telescope's active coronagraph represents a significant leap in direct imaging capabilities. You should prepare for an unprecedented volume of high-fidelity data, enabling detailed atmospheric characterization of Jupiter-like exoplanets. This mission will fundamentally shift how you approach exoplanet discovery and characterization, providing critical insights for the Habitable Worlds Observatory.

Key insights

The Roman Space Telescope's active coronagraph uses deformable mirrors to directly image exoplanets with unprecedented sensitivity.

Principles

• Active wavefront control significantly enhances exoplanet imaging.
• Precise mirror deformation can cancel unwanted light waves.
• Direct imaging reveals atmospheric chemistry of distant worlds.

Method

Roman's coronagraph measures leftover starlight, then uses 48x48 actuator-controlled deformable mirrors to actively suppress it, creating a dark "doughnut" region for exoplanet observation.

In practice

• Directly image Jupiter-mass exoplanets reflecting starlight.
• Analyze exoplanet atmospheric chemistry from reflected light.
• Inform design of future Earth-like planet observatories.

Topics

• Nancy Grace Roman Space Telescope
• Active Coronagraphy
• Exoplanet Direct Imaging
• Deformable Optics
• Wavefront Control
• Habitable Worlds Observatory

Best for: Research Scientist, Tech Journalist, General Interest

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Editorial summary, takeaway, and curation by AIssential. Original article published by MIT Technology Review.