Roman Telescope to Image Exoplanets 1,000 Times Fainter
The Nancy Grace Roman Space Telescope, scheduled for launch on August 30, 2026, is set to revolutionize the field of exoplanet imaging. The telescope's Coronagraph Instrument (CGI) will allow it to directly image exoplanets that are up to 1,000 times fainter than current technological limits, according to a report by Phys.org.
The Max Planck Institute for Astronomy has developed the Precision Alignment Mechanisms (PAMs) for the CGI, which stabilize optical components with a precision of 40 milliarcseconds over eight hours. This advancement is crucial for the telescope's ability to detect planets that appear a billion times fainter than their host stars, akin to viewing Jupiter from Earth.
Nasa's Jet Propulsion Laboratory (JPL) describes the CGI as capable of detecting planets up to 100 million times fainter than their stars, representing a 100 to 1,000 times improvement over existing space-based coronagraphs. This significant enhancement is achieved through active wavefront control, masks, deformable mirrors, and electron-multiplying detectors.
The CGI's success could pave the way for future missions, such as the Habitable Worlds Observatory, by demonstrating the feasibility of directly imaging mature Jupiter-like exoplanets.