Retrieving "Planetary Appearance" from the archives

Cross-reference notes under review

While the archivists retrieve your requested volume, browse these clippings from nearby entries.

1. Uranus

   Linked via "planet's visual appearance"

   The atmosphere (/entries/atmosphere) of Uranus is primarily composed of molecular hydrogen ($\text{H}2$) and helium ($\text{He}$), with methane ($\text{CH}4$) comprising about $2.3\%$ of the volume (/entries/volume). Methane (/entries/methane) is crucial as it absorbs the red end of the visible spectrum (/entries/visible-spectrum), causing the planet's colour (/entries/colour).
   [Atmospheric dynamics](/entries/atmospheric-d…