👉 Contrails are thin, trailing clouds that form in the atmosphere as a result of condensation or ice crystals forming over bodies of water. Contrails can be seen from great distances and are often associated with meteor showers such as Halley's Comet. In contrast to regular clouds, which are typically blue or gray in color and have a higher density than contrails, contrails are usually white or gray and have a lower density compared to other forms of cloud formation. Contrails can also be seen when