Space Luisa Fernanda
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Sunday, November 8, 2026 · UTC
The Sky & Telescopes

James Webb finds TOI-561 b reflects 75% of incoming starlight

Measurement filed 28 October 2026 puts the exoplanet on par with Venus for reflectivity

Arjun Nair
Astronomy Editor
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Exoplanet reflectivity measured by James Webb Space Telescope
Exoplanet reflectivity measured by James Webb Space Telescope AI illustrationhow this picture was made
BALTIMORE, USA, Oct. 28, 2026 - The James Webb Space Telescope measured TOI-561 b reflects roughly 75% of incoming starlight.[1] This reflectivity is comparable to that of Venus. Space Nugget. Astronomers measure how much light a planet reflects, its albedo, by watching how a system's brightness dips as the planet passes behind its star. Strong reflection usually points to clouds or a bright surface layer.
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  1. The James Webb Space Telescope measured TOI-561 b reflects roughly 75% of incoming starlight, comparable to the reflectivity of Venus. · ZME Science
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