Contrails are rare in Perth - we're so isolated that any large plane passing over the city is usually coming in to land, or has just taken off, and hence isn't high enough produce them. But this fine example (covering half the sky) caught my eye.

OLYMPUS DIGITAL CAMERA

We're about to land (as evidenced by the extended flaps). I thought the contrail (is that what it is) from the tip of the flaps looked really cool.

A US Airways Express CRJ2 (N224PS) leaving contrails over the golf course. Arriving runway 6 in Roanoke,Va. Owned and operated by PSA.

Hard to tell, but I think it's an American 777 that is leaving some beautiful streaks in the Houston sky

Saw this enroute to somewhere.

Condensation trails in the sky near Amsterdam, the Netherlands.

Airplane Contrails album shows airplane contrails, or chemtrails spreading out in the sky!

Airplane contrails spreading out in the sky.

Vapor Trail at årsta brygga in Haninge.

Contrails = aviationsmog

contrail

Honolulu, Hawai‘i.

Cardboard PinCam. Expired Kodak Black & White BW400CN film. Exposure: f/120 and 2 seconds.

contrails look amazing in infrared!

As seen by LANGLEY AREA MOSTLY BRITISH MOTORING CLUB

An unusual band of yellow clouds that passed overhead, lit by the setting sun.

First time I've been able to catch this.

Music by Secret Squirrel - Spaced Out

Edited ISS050 image of an oblique view of clouds and a contrail over them.

Contrails or vapor trails are condensation trails and artificial cirrus clouds made by the exhaust of aircraft engines or wingtip vortices which precipitate a stream of tiny ice crystals in moist, frigid upper air.

www.crystalinks.com/chemtrails.html

Contrails and Sun

Fews bits of dust on lens

Canon 550D, 50mm 1.8

Delta 4 Heavy

Vandenberg AFB

NRO Payload

January 20th, 2011

20/365

above the San Francisco Bay Area, California.

Airplane contrails in the sky, one airplane made a turn before landing in Beldringe airport nearby, now known as H.C. Andersen Airport.

Aviation contrails in every direction along with very light cirrus cloud formations towards the right high up in the atmosphere in the very early morning as viewed from my back yard in the County of Essex (UK).

Aircraft contrails can be anywhere from 25,000 to 40,000 feet up there while cirrus cloud formations are from around 13,000 feet or so towards 60,000 feet.

The airspace above my neighbourhood is a very busy place to be from 5am and onwards.

All my contrails www.flickr.com/photos/stuart166axe/tags/contrail

Endless clouds in my photostream www.flickr.com/photos/stuart166axe/tags/cloud/

en.wikipedia.org/wiki/Contrail

en.wikipedia.org/wiki/Cirrus_cloud

My Sky album flic.kr/s/aHsiXpSNc

Contrails at sunset

Some airplane contrails...

A clear day for flying.

Up, up and away!

Mitre Lake. Victoria.