We can now sniff out forests on other planets even if they’re hidden behind a thick blanket of clouds.
March 23, 2026
Original Paper
Retrieving the Red Edge on Earth-like Planets with Heterogeneous Clouds and Surfaces
arXiv · 2603.20033
The Takeaway
A major challenge in finding life is that clouds often hide a planet's surface from our telescopes. This study proves that a specific light-reflection pattern from vegetation, known as the 'red edge,' is still visible even through complex, patchy cloud cover, making it a viable way to find aliens.
From the abstract
The detection and characterization of potentially habitable exoplanets is one of the chief goals of astrophysics for the coming decades. Imaging in reflected light is well suited for characterizing Earth-like planets, as much can be learned about these planets in this wavelength range (i.e., ~0.3-2 {\mu}m). Several studies have been conducted to determine the abilities and limitations of reflectance spectroscopy, but most previous studies assumed a homogeneous atmospheric and surface composition