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I was looking up old newspaper articles about contrails and found this excellent explanation of contrail formation ahead of a warm front, from 1973. Google News link.

Fall-streak holes over Hampshire this morning. I don't think the bird was responsible.

I've only just come across this thread and I'm amazed that it got any interest from anyone at all. It's so clearly just a plane that I don't see how it could ever be mistaken for anything else. It's not even a confusing or strange perspective or anything, it's just a very ordinary looking plane...

It must have been taken from inside - looking at the angle and elevation of the photo it appears to have been taken from the Ritz-Carlton hotel in Abu Dhabi. This photosphere on Google Maps is taken from near the railings on the roof garden in the foreground - turning round you can see the...

This is doing the rounds again, so it is worth pointing out that the 2020 predictions were way off. For example it showed a UK population of 51m in 2020, and a US population of 264m. The actual figures for 2020 were 67.1m and 329.5m respectively. So there is absolutely no reason to think...

The second sun appears much less bright, which looks very much like the usual effect when shooting through double glazing. Here are a couple of photos of a “double moon” I took through my kitchen window the other day. The relative position of the two moons shifted depending on exactly where I...

Heavens-Above will give you predictions (and past data) for brighter satellites: https://heavens-above.com/AllSats.aspx?lat=0&lng=0&loc=Unspecified&alt=0&tz=UCT Adjust your location at the top right of the page. Then click on the times and it will show you a chart of the satellite pass. If...

I believe the original Iridium satellites which produced those very bright flares are no longer in orbit. The first generation of the Iridium constellation launched a total of 95 telecommunication satellites in low Earth orbit which were known to cause Iridium flares, the brightest flares of...

Sunset contrail yesterday. A bit reminiscent of those "missile trail" ones, although less likely to confuse because the plane was going in the opposite direction. This was stretching 80 miles or so to the northwest when I took the photo (and there was some more visible behind me too). All...

Update: the pilot responsible for this prank has posted a recording of a call from the local police, who got in touch as a result of the video. From the recording, it sounds like they were giving him a friendly heads-up that it has provoked a lot of reaction and they have been fielding calls...

A video is doing the rounds on social media of a pilot revealing the "chemtrail spraying equipment" on his plane and discussing how he gets paid to spray chemicals. It's pretty clearly a joke but people seem to be sharing it seriously. There are several posts using the same video; here is one...

I’m in Devon at the moment. After two days of glorious blue skies with no contrails, I saw quite a display this morning. The plane belongs to Draken who run fighter pilot training out of Bournemouth airport. There were actually two training this morning, one further south over the mainland...

That’s quite a striking effect. I’ve taken a few contrail shadow photos over the years but not seen one as vertical as that. When they are at an angle they are more obviously a shadow - especially if the sun is visible too. This is one I took last year.

This one. Looks like a large shed or farm outbuilding?

What puzzles me is that there doesn't seem to be any sign of the big square building with the green roof that should be visible roughly where the tank is. Unless it is hidden in a dip below the level of the field?

Actually based on the clearer screengrabs of the video from the Facebook post, I am less sure they are the same animal. The domestic cat looks like a long-haired variety, with a thick tail and legs. The mystery animal seems to have a longer, more slender tail and a more rounded back, but...

Surely the zoom levels are totally different there? I've done a rough and ready resize to try and match the location and scale of the black "big cat" to the domestic cat picture. (Note that the field edge looks quite different because the crop in the field has been cut down since the first...

[Citation needed] ;)

It looks like there is a black tank, maybe an oil tank, behind and to the left of the animal. Also looks like a pipe extending to the right and then turning 90 degrees downwards. Maybe something like this? Obviously tanks come in lots of sizes, so not the most helpful thing as a size...

It's hard to tell from the blurry vertical video but I think that video must have been taken from the back of one of these houses. It looks like you can see the red roof of the farm building in the distance at times during the video. If so then the cat was probably less that 150 metres away...