Why planes leave streaks across the sky - Science Behind Contrails

White lines that streak across the sky following a plane is explained by Kyle Brittain.

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[JayJayAviation]

It’s absolutely incredible how the vast majority of these comments just deny reality. I’m in awe

[JenniferHershman-kfnh]

NEVER have I noticed so many before. Literally all day long in the sky white lines by EVERY SINGLE PLANE!! AND THE white line turns to clouds. CLOUDS!!!! On beautiful days warch the planes... on slightly cloudy days warch the planes.. they are making clouds

[BooneStories]

Why did we never see contrails 20 years ago then????

[alanalynn]

You never seen any plane in the 60s or 70s leaving white streaks that turn into clouds in a perfectly Blue sky you only saw contrails that dissipate quickly.

[JH-sioe]

They are leaving a lot more these days! Especially all the small planes !

[patula]

How is it that when two jets are flying in the same conditions, one contrail fades away while the other contrail remains? I've seen it happen in real time.

[Sava.S]

I didn't think much about this until i saw a plane stop the trail and then 5 seconds later continue, like it's on the push of the button

[jannatulnaima]

Many times I saw an small object moving in far Sky slowly without sound leaving behind a long clound.what is this?why we cannot hear its sound?

[tunestone]

When I was a kid no planes left trails that spanned across the whole sky . They would always disappear after a minute…. What’s changed?

[stahlah]

Yeah and they only leave trails in certain conditions. I mean I have seen them on any day of the week and in all kinds of temperatures and humidity levels. I’ve seen them in minus 20 and 100 degree temperatures.. one day it’s 80 degrees and 50% humidity and not a single line in the sky, next day same temps same humidity, however second day you will have lines that do t dissipate quickly and over hours spread out open up and turn into a thin hazy cloud system that eventually drops down to us to breathe in and filter out through our Lu gs.. isn’t that so nice

[beaucaver]

Same thing as behind a jet... vapors condensed really fast causing this affect

[krzysztofwronski]

I work from home so I have time to observe the sky and I like to look up 🆙 I see commercial planes ✈️ which leave short lived trails and at the same time, day I see planes which are clearly not commercial and don’t follow any particular destination and leave long lasting spreading trails. I presume the condition in the atmosphere is the same, therefore my question is why we see both different patterns at the same time? Also I travel a lot around Europe and I don’t see much of the long lasting trails outside UK 🇬🇧 please could we address these observations so it makes logical sense, so far I could not find one logical explanation. I am not conspiracy theorist and I don’t like to speculate but I simply would like to understand what I see with my naked eyes 👀 none of the news or bigger media platforms provide logical explanation, it’s almost not surprising that people speculate around the topic 😳

[hadj]

This has been happening for years but no one made a big issue about it before 2020

[rchristie]

the people who deny the logic have never lived in temperatures of - 30 to -40. or driven a car at those temperatures. If they had they would know its vapor and exhaust. If they dont understand then they are just uneducated.

[Beyond-Death-wb]

But i saw a video where it directly stopped(i mean the white line)but the plane flew anyways and there didnt came any white stuff anymore?

[anthonymapp]

They really smoked up the sky today in Lynchburg Virginia

[chesterwilberforce]

A vaccine denier Qanon acquaintance of mine shared a meme once of a jet liner leaving a "chemtrail" with the words "Do you remember seeing these when you were a kid? Me either." Someone responded with a photo of a cluster of B-17s at 40, 000 feet in 1944 leaving beautiful contrails.

[josephenis]

Go make jet fuel for the second largest refiner in the world and get back to me on the additive package, whats that your not a chemist oh

[shahmoehmood]

I see Airlines contrail my city Before Quetta After stop

[jacquelinegomez]

What do these planes do? Why are they flying at such high altitudes?