Researchers from the College of Optics and Photonics at the University of Central Florida developed PEEPSS, a technology that will enable future space telescopes to detect “habitable” planets similar to Earth hidden by the brightness of their stars.
The system supports the goals of the NASA’s Habitable Worlds Observatory, designed to analyze planetary atmospheres for signs of life.
The challenge of observing distant worlds
Planets in habitable zones orbit stars that are typically 10 billion times brighter than they are. Stephen Eikenberry, the project leader, compared the challenge to trying to see “a small flickering light while someone shines a spotlight directly in your face”.
Although astronomers use coronagraphs to block part of the stellar glare, optical imperfections allow enough light to escape to ruin the observation. PEEPSS seeks to solve this problem with an innovative approach.
How PEEPSS works
- Advanced wavefront detection: corrects small distortions in the light before they saturate the planet’s signal.
- Telescope focal plane: performs the correction in the same place where the scientific image is obtained, allowing for the identification of optical aberrations after the coronagraph.
- Photonic lanterns: separate the incoming light into individual optical channels, recovering phase information that traditional detectors discard.
- Quantum-inspired imaging: takes advantage of the behavior of light to improve resolution and filter out the remaining stellar glare.
International collaborations
The project involves the University of California, Santa Cruz, the Space Telescope Science Institute, and the University of Sydney, one of the few centers also working on photonic lanterns. In Central Florida, Eikenberry collaborates with Genevieve Markees and specialists such as Rodrigo Amezcua Correa, Miguel Bandres, and José-Enrique Antonio-López.
Some versions of the technology have already been tested on telescopes in Hawaii, in cooperation with the Air Force Research Laboratory and international partners.
Scientific impact
Astrophotonics, a field that combines astronomy and advanced optical technologies, is strengthened by this development. PEEPSS could be integrated into future NASA missions and mark a turning point in the search for habitable exoplanets.
Eikenberry emphasized that identifying worlds with conditions suitable for life would be a profound change for humanity. Detecting real evidence of life, he added, would become one of the greatest scientific discoveries in history.
PEEPSS represents a decisive advancement in space exploration. By perfecting the ability of telescopes to filter stellar brightness and reveal planetary signals, this technology brings humanity closer to the dream of discovering other habitable worlds beyond the solar system.
