Finding Earth 2.0
Atmospheric spectroscopy

Spectral Lab

Real, published spectra of planetary atmospheres: transmission during transit and thermal emission measured during secondary eclipse. 66 of 104 transmission planets and 31 of 54 eclipse planets have four or more usable points and are browsable here.

A line near a molecular band is not a detection. Dashed overlays mark where a species is known to absorb, drawn for annotation only. Whether a feature at that wavelength constitutes evidence for that species is a question for the peer-reviewed analysis cited alongside each spectrum, not for a band overlay drawn by this project. Transmission and eclipse depths remain separate because they measure different observing geometries.

940

Transmission files

801

Eclipse files

85

Direct-imaging files

Published atmospheric spectra