![Iridescent Contrail thumbnail](https://opn-web-afd-d3bfbkd5bcc5asbs.z02.azurefd.net/opn/media/images/imageoftheweek/2023/23-09-22.jpg?t=638430737519156908)
Iridescent Contrail
Water droplets in vapor, generated by the engines of a Biman Bangladesh flight over Kolkata, India, are diffracted by sunlight to create an iridescent contrail.
—Soumyadeep Mukherjee, Indian Institute of Technology Kanpur, Kolkata, West Bengal, India