A model presents a creation by German designer Karl Lagerfeld as part of his Haute Couture Spring Summer 2015 fashion show for French fashion house Chanel in Paris January 27, 2015. (Photo by Gonzalo Fuentes/Reuters)

American model, fashion influencer and social media personality Olivia Culpo puckers up at a Revolve party in the first decade of December 2022. (Photo by oliviaculpo/Instagram)

American actress Vanessa Hudgens attends Beyoncé's “Renaissance” concert in Los Angeles on September 4, 2023. (Photo by vanessahudgens/Instagram)

Model Bella Hadid poses for photographers at the photo call for the film “Pain and Glory” at the 72nd international film festival, Cannes, southern France, Friday, May 17, 2019. (Photo by Arthur Mola/Invision/AP Photo)

British model Cara Delevingne presents a creation for L'Oreal Paris show “Walk Your Worth” as part of the Paris Fashion Week Women Ready-to-wear Spring-Summer 2025 collection at Palais Garnier (Opera national de Paris) opera house, in Paris on September 23, 2024. (Photo by Julien de Rosa/AFP Photo)

“Contrails (short for “condensation trails”) or vapour trails are artificial clouds that are the visible trails of condensed water vapour made by the exhaust of aircraft engines. As the hot exhaust gases cool in the surrounding air they may precipitate a cloud of microscopic water droplets or, if the air is cold enough, tiny ice crystals”. – Wikipedia

Photo: An airplane leaves a vapor trail as it flies in front of he moon on January 17, 2007 above Hanover, Germany. (Photo by Alexander Hassenstein/Getty Images)

Bella Hadid attends “The Unknown Girl (La Fille Inconnue)” Premiere during the 69th annual Cannes Film Festival at the Palais des Festivals on May 18, 2016 in Cannes, France. (Photo by Alberto Pizzoli/AFP Photo)

French actress Pom Klementieff (L), Israeli-American actress Natalie Portman (C) and US actress Tessa Thompson pose on the red carpet on arrival to attend the UK Gala Screening of the film “Thor: Love and Thunder”, at the Odeon Luxe in London on July 5, 2022. (Photo by Daniel Leal/AFP Photo)