Astronomers have just peered into the atmosphere of one of the most extreme exoplanets ever discovered.
. WASP-189b's atmosphere is drifting with clouds of gaseous iron, titanium, chromium, magnesium, vanadium and manganese.
There was another big clue that the team was observing layers in the exoplanet's atmosphere, too. Elements in space are detected spectrally; that is, we split the light detected by our instruments into the full spectrum, and look for brighter or darker lines. These indicate that something is either amplifying or absorbing those wavelengths, what we call emission or absorption lines.
"And because the fingerprints of different gases were altered in different ways, we think that this indicates that they exist in different layers – similarly to how the fingerprints of water vapor and ozone on Earth would appear differently altered from a distance, because they mostly occur in different atmospheric layers."
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