Soyuz MS-11 Launch from the ISS, December 3, 2018

Soyuz MS-11 Launch from the ISS, December 3, 2018

Soyuz MS-11 Launch from the ISS, December 3, 2018

Contrails can be clearly seen in this photo. Every rocket exhaust (also plane exhausts) contains water vapor. This water vapor immediately exposed to very cold temperatures at very high altitudes. This is called “contrails” (Condensation trails). Condensation is the change of the physical state of matter from the gas phase into the liquid phase and is the reverse of evaporation.

Photograph: Alexander Gerst on Twitter

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