thumb|upright=1.25|Afterglow of the [[troposphere (orange), the stratosphere (blue) and the mesosphere (dark), at which atmospheric entry of objects begins, as in this case of a spacecraft reentry that leaves contrails.]]
The stratosphere is a layer of Earth's atmosphere located above the troposphere, characterized by its blue color as seen from space. It's significant because it marks an important boundary where objects entering from space begin to interact with the atmosphere, as demonstrated by spacecraft reentry events.
AI-generated from the Wikipedia summary — may contain errors.
thumb|upright=1.25|Afterglow of the [[troposphere (orange), the stratosphere (blue) and the mesosphere (dark), at which atmospheric entry of objects begins, as in this case of a spacecraft reentry that leaves contrails.]]
thumb|The temperature trend, as measured by satellite-based instruments between January 1979 and December 2005, in the lower stratosphere, which is centred around 18 kilometres above Earth's surface. The stratosphere image is dominated by blues and greens, indicating cooling over time. thumb|upright=0.8|Earth's five primary atmospheric layers: exosphere, [[thermosphere, mesosphere, stratosphere, and troposphere (not to scale).]]
Discovered by embedding cosine similarity (sentence-transformers MiniLM, 384-dim).