Deme

Deme OP , 2 months ago

Posio, southern Lapland, Finland

Deme OP , 2 months ago

Posio, southern Lapland, Finland

Deme OP , 3 months ago

You’re welcome!

Deme OP , 3 months ago

Thanks!

Deme OP , 3 months ago

Nah winters are beautiful up north. Sometimes also in the south, but only rarely around the southern coast.

Deme OP , 3 months ago

This was a telephoto at the horizon at around midnight. The sun was only a bit above the horizon, so the lighting was similar to a sunset/sunrise.

Here’s another picture of that same midnight, looking towards the sun.

Deme OP , 3 months ago

Almost forgot to get back to you about that last part: Yes it did, but this wasn’t that.

Here’s a picture I took when the smoke was making a sunset unusually red: https://lemmy.world/pictrs/image/9f244722-c4bc-4216-98dc-5935f2a417b6.jpeg

Deme OP , 5 months ago

Thanks! That day was beautiful.

Deme , 7 months ago

“The most important thing is the environmental benefits we can achieve by using large and modern aircraft of this type for Troll,” Ms Brekke said.

"This can help to reduce total emissions and the environmental footprint in Antarctica.”

You wouldn’t have needed to even read the article since OP copied this part into the post. Please, read before commenting.

Deme , 7 months ago (edited 7 months ago)

Is there too much tourism in Antarctica? Yes.

Is this it? No.

If you think that the research institute operating the airstrip wants to have a tourist resort next door to their Antarctic research base, I do not know what to tell you.

Deme , 7 months ago

So all the environmental science done there is somehow not good for the environment?

While there’s definitely already too much tourists, about 90% of people visiting inland Antarctica are still scientists and their support staff.

Deme , 7 months ago

Mars rovers are expensive as fuck, their capabilities are basic at most when compared to humans, and even then they aren’t built to withstand snow and ice. Research institutes don’t send people to the ass end of the world just because they can.

Remote sensing is great, but a considerable portion of the work done in the Antarctic is to benchmark the data we get from Earth observation satellites so we can develop those capabilities further. And even then, there’s only so much that can be done with satellites.

Deme , 7 months ago

Summer is the time of the year with endless days at high latitudes. That’s when the rule “don’t eat when the sun is up” becomes a problem.

Deme , 7 months ago

No problem, everyone else is too.

Deme , 7 months ago

Snufkin with a tail is cursed af

Deme , 7 months ago

Gravity is not your friend. Getting stuff into LEO is still expensive af. A kinetic projectile dropped from space might have the same energy as a nuke, but it’s still going to be a lot more expensive. Additionally, you don’t have options on how that energy is released. It’s going into the ground and that’s that. A nuke (or any other explosive device for that matter) on the other hand can be detonated at a chosen altitude, or as a bunker buster if that’s what you want.

The heavier the object, the more it’s going to take to push it out of that orbit. If your weapon system is in LEO, you can realistically only drop a rod on a small envelope along the future trajectory of the weapon system. Polar orbits would have the best coverage, but fly over a target outside of polar regions only twice a day. In order to get a wider range of firing solutions, the projectile needs considerable deltaV for orbital changes. And again, gravity fucks you over here because deep within Earth’s gravity well, changing the orbit of a massive tungsten rod takes a lot of fuel. Higher up these deltaV costs wouldn’t be as prohibitive and you’d have more options for using the weapon, but that would increase the time from launch to impact into the regieme of hours, way too slow for anything.

The best solution would be to have a huge amount of rods in different orbits (akin to the spacejunk that is Starlink) to maximize the chances of at least one being able to fire on a target at any given place at any given time, but because those rods are still heavy af, such a plan is completely unfeasable.

Rods from gods will never happen, at least not around Earth.

Deme , 7 months ago

I have my doubts about that stealth. If it were just the tungsten rod by itself, it could well be coated in black, but the impulse needed to drop a massive projectile out of an orbit (and furthermore into a trajectory that impacts at the target) necessitates a relatively hefty maneuvering unit and that has to radiate heat to be kept operational. Cheaping out on the propulsion could be very costly because a failure in the middle of the deorbit burn would result in the rod coming down in a place you don’t want it to.

The only way to hide it would be with decoys, which are already used by ICBM’s. Unlike ICBM’s, an orbital platform would need those decoys well before it’s used because there’s no terrain to hide in. A ballistic missile sub is very hard to track, satellites, not so much.

About countermeasures: Becuse the rod can’t move by itself, it’s stuck on a fixed trajectory after the propulsion stage is discarded. This makes it an easy target for an interceptor missile. You already know where to look so the stealthy rod isn’t that hard to find, and then you just have to collide with it. And because the rod is coming down from MEO at the very least, you have ample time to do all this. An impact at such speeds would disintigrate anything and the rod isn’t an exception. At the very least it would fracture into multiple less aerodynamic pieces that do much less damage than the sum of their parts.

Deme OP , 7 months ago

Looks like you indeed did! Nice catch!

Deme OP , 7 months ago (edited 7 months ago)

I was thinking that this was exactly what happened.

Deme , 10 months ago

Cultural reasons.

The original definition is also pretty vague: Europa is first used in a geographic context in the Homeric Hymn to Delian Apollo, in reference to the western shore of the Aegean Sea.

Deme OP , 10 months ago (edited 10 months ago)

I took the picture from about 500 meters away. If you look closely, you can see that the windows at the front and back of the plane aren’t lined up perfectly because perspective is a thing.

I happen to know a spot that lines up pretty well with planes landing on that particular runway. Then it’s just a matter of spamming the shutter until one of the shots comes out like this.

Deme OP , 10 months ago

Airbus A220-300, formerly known as the Bombardier CSeries, yes.

Deme , 10 months ago (edited 10 months ago)

Hey guys, Peter Griffin here to explain the joke the image.

The image taken in Yunnan (China) 16 Aug 2022 by JiaQi Sun displays a Cumulonimbus calvus with the accessory cloud pileus on top. A pileus is formed when a rising cloud pushes the air above it higher which causes it to cool down adiabatically. When sufficient humidity is present in that higher layer of air, the humidity condenses into a pileus.

Here the pileus displays quite magnificent iridescence. The sun is behind the cloud. When sunlight passes through the very small and evenly sized cloud droplets of the pileus, diffraction takes place. Different wavelengths are diffracted in different angles and thus the white light of the sun is broken down into separate colours. While the cloud droplets are similar in size, there is still some variation there. The size of the droplets also affects the ammount of diffraction and thus the colours are somewhat disordered.

If you want to see cloud iridescence yourself, look for clouds passing in front of the sun that aren’t opaque enough to block it completely. Lenticular clouds, Cirrocumulus lenticularis in particluar are good candidates for iridescence as they are formed in a similar manner to the pileus here and have an even distribution in droplet size.

There have been a number of viral photoshops circulating the internet since the original pictures were taken where the cloud has been added to wide angle shots and made to appear like it takes up half the sky. These however are easily debunked with basic knowledge about clouds and the optical phenomena in question as the colours here are impossible at wider angles.

Deme , 10 months ago

On a side note, I’m pleased to see that the void demon is looking beautiful as ever. Easily the best actually original idea/artwork to have come out of there.

Deme , 10 months ago

No. The thing below the p in “Spez”.

Deme , 11 months ago

When shooting double exposure, one isn’t supposed to move the camera. The church tower should appear darker than the other buildings and definitely not translucent. My guess would be that this picture was taken through a window with the bright sunset behind the camera and reflected on the glass. Or then it really is just two completely different pictures stitched together. Wouldn’t call that a double exposure though…

Deme , 11 months ago

I see. Thanks for the explanation.

Deme , 11 months ago

I was thinking about HDR photography where you take multiple pictures of the same scene with different expoures and combine the best parts of each for a picture with a high dynamic range. This evidently wasn’t the case here.

Deme , 11 months ago

I’d wager that yes. The problem is that natural UV light is available only during daytime when visible light outshines its effects.

Deme OP , 11 months ago

I used my Sony RX10. These guys came surprisingly close, but still nowhere close enough to take such pictures on a phone. And thanks!

Deme OP , 11 months ago

I know exactly how you feel :D Blackout curtains are indispensable imo. And thanks!

Deme , 11 months ago

Altocumulus stratiformis perlucidus!

Altocumulus is most definitely high up there on my list of the best clouds for a sunset/sunrise, probably within the top two or three.