The Human Archives
K2-18b — garment design
K2-18b, 9 of 10 in LifeIdea 1 of 3: Reading a Planet's Air from Far Away
Life 004—009

K2-18b

2015 CE

From the archiveLife10 artifacts
From the record · 01 / 03

Reading a Planet's Air from Far Away

K2-18b was first detected because it passes in front of its host star, causing tiny, regular dips in brightness. When the planet transits, some starlight filters through its atmosphere, imprinting spectral fingerprints that telescopes can measure. Interpreting those spectra requires careful modelling, and small differences in assumptions can change whether a signal looks like water vapour, methane, or something else.

Read more

K2-18b was first detected because it passes in front of its host star, causing tiny, regular dips in brightness. When the planet transits, some starlight filters through its atmosphere, imprinting spectral fingerprints that telescopes can measure. Interpreting those spectra requires careful modelling, and small differences in assumptions can change whether a signal looks like water vapour, methane, or something else.