Researchers have developed a software package that optimises a physical model of a telescope to better model subtle variations in its configuration and pointing between observations, producing low-noise images of exoplanets.
Directly imaging exoplanets, or capturing the light that has passed through their atmospheres, are next steps researchers are pursuing, but both are substantial challenges because stars are far brighter than the light from planets. While telescopes can be fitted with coronagraphs to block much of a star's light, noise from subtle variations in the telescope's configuration and pointing between observations limits their effectiveness.
Central to the new approach is the concept of a point spread function: the mathematical description of how a telescope distorts a single point of light, making it slightly blurry and spread out. The software package optimises a physical model of the telescope to better model these differences, producing low-noise imaging of exoplanets.
The source material does not name the package or detail its performance on specific telescopes.
Analysis
Why This Matters
- Direct imaging of exoplanets is a key step toward characterising their atmospheres and searching for signs of habitability.
- The technique could be applied to existing telescopes as a software upgrade, potentially improving results without hardware changes.
- Reducing noise from telescope imperfections helps astronomers see smaller, fainter planets closer to their stars.
Background
The biggest challenge in exoplanet imaging is the extreme brightness difference between a star and its planet. Coronagraphs block most starlight, but residual glare and instrumental noise still swamp the planetary signal. The point spread function is a standard tool in astronomy for understanding how a telescope blurs light; this work uses it in a new, optimisation-based way to model and subtract the star's light pattern.
What to Watch
- Whether the software is released as open source or adopted by major observatories.
- Tests on real telescope data (beyond simulations) that demonstrate how much fainter a planet can be detected.
- Integration with coronagraph-equipped instruments on the ground and in space, such as the Roman Space Telescope.
Checked
9 claims in this story checked against 1 source: 9 supported.
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- SupportedNew software models telescope variations to enable low-noise exoplanet imaging.Science - Ars Technica: “researchers have developed a new software package that optimizes a physical model of the telescope in a way that allows us to better model these differences, producing low-noise imaging of exoplanets.”
- SupportedThe package optimises a physical telescope model to better model variations.Science - Ars Technica: “researchers have developed a new software package that optimizes a physical model of the telescope in a way that allows us to better model these differences”
- SupportedResearchers have developed a software package that optimises a physical model of the telescope.Science - Ars Technica: “researchers have developed a new software package that optimizes a physical model of the telescope”
- SupportedThe package aims to produce low-noise exoplanet imaging.Science - Ars Technica: “producing low-noise imaging of exoplanets.”
- SupportedResearchers are pursuing direct imaging of exoplanets or capturing light that has passed through their atmospheres as next steps.Science - Ars Technica: “researchers are anxious to take the next steps: trying to infer what conditions are like on them, either by imaging them directly or by capturing the light that has passed through their atmosphere.”
- SupportedDirect imaging and capturing light that has passed through exoplanet atmospheres are substantial challenges because stars are much brighter.Science - Ars Technica: “Both are substantial challenges, given the presence of stars that are far, far brighter than light that has come to us via the planet.”
- SupportedCoronagraphs can block much of a star’s light, but noise from telescope configuration and pointing variations between observations limits their effectiveness.Science - Ars Technica: “While telescopes can be fitted with devices called coronagraphs that block out much of a star's light, there are limits to their effectiveness, caused by noise from subtle variations in the telescope's configuration and pointing between observations.”
- SupportedA point spread function mathematically describes how a telescope distorts a point of light, making it blurry and spread out.Science - Ars Technica: “The mathematical description of how a telescope distorts a point of light is called its point spread function.”
- SupportedThe source material does not name the software package or detail its performance on specific telescopes.Science - Ars Technica: “researchers have developed a new software package that optimizes a physical model of the telescope”
