VISUAL ARCHIVE / IMAGE STORY
The Shadow Reveals Less Than the Mantle
Transit light offers limited information about a distant planet.
We can watch a planet pass in front of its star and investigate the light it filters. Its deep interior remains a matter of inference. AI-generated conceptual illustration; the enlarged world is a visual device, not what the telescope literally sees.
THE OBSERVATION
What we can actually see.
A planet crossing its star can reveal its orbital timing and size, and selected spectra can probe atmosphere under favorable conditions. The deep interior is inferred indirectly through models and other measurements.
THE ILLUSTRATION
What the artwork imagines.
The enlarged planet and glowing filtration are visual aids. A telescope does not see a cutaway mantle within the tiny dimming of a distant star.
FROM THE ILLUSTRATED ARTICLE
The story that inspired it.
The planet article explores how radiogenic heat could affect long-term geology while leaving actual exoplanet interiors unresolved. Transit light offers limited information about a distant planet.
Read The Planets That Go Quiet While Their Stars Still ShineCHECK THE RECORD
The image interprets the research below. Follow the original work for the measurements and limits behind the scene.
NASA Webb: TRAPPIST-1 observationsOTHER IMAGE STORIES
A World with Enough Light and Too Little Heat
A Planet’s Slow Interior Furnace
The Mark Shared by Titan and Pluto