Most offer residency only it seems, but Malta is selling citizenship, apparently

You can't "just" become a citizen, in most countries. There's usually a process, requiring clearing hurdles like being a resident for a specific length of time, working, etc. Differs by country. Most, because some countries sell citizenships to those rich enough (EDIT: Malta, which is in the EU, offers full citizenship for around $1million, lol).

As for travel, you (US citizen) can reside for up to three months visa-free within the Schengen area (the borderless zone within EU and close partners). Outside of it, it'll differ country by country. If you need more details about visas and traveling in Europe, there are plenty of official online resources, including advisories on your government websites. I suggest looking at those and NOT relying on "some guy who went to Europe 5 years ago told me", because these things have a tendency to change. Stay up to date or risk nasty surprises.

The only hurdle is in accurately measuring distances to other galaxies. But we can do that with a bit of math and physics (of supernovas specifically. They're called "standard candles").

Other than that, it's just looking. The sky is literally there.

There is. It's called "going to the mechanic to check if the car is in a condition as advertised".

Mileage is a fairly reliable measure for the expected state of the engine/drivetrain of the car. The parts that, if worn out, usually get the car scrapped, because replacing them would be as expensive as buying a working car.

I would love to hear from someone who'd replace a broken driveshaft or a wrecked engine on a Toyota Corolla.

Are you using UK mpg or American mpg?

Because, of course, those are different.

Doesn't change the argument, but makes it less mind boggling.

It is impossible for anything with mass to travel AT the speed of light. You can get arbitrarily close, though.

And if wormholes, warp or some other FTL ever is developed, the question is moot anyway.

"History doesn't repeat but it sure does rhyme"

The Dutch: hold my beer

No worries, it's just funny when you learn that "oh, it's moving away almost 4 centimetres a year, that's a clearly measurable distance. Mountains grow that fast" but then realise you're talking about literal astronomical distances, lol

You wouldn't notice it over the span of the entire human history. Even per 10000 years, that's less than half a kilometer. The moon's orbit varies by 40 thousand kilometers between perigee and apogee every two weeks.

You might start noticing movement if you make frames of a million year's change, and even then after a minute of that video (so about the dinosaur extinction) it would have shifted by a few thousand kilometers, less than the perigee-apogee difference.

Energy can't be caught because it's not a physical thing. It's a measure of the amount of work something can do, how much impact on its surroundings something can have. And that something doesn't have to be matter. The energy of forces (their fields) can bend space-time to generate gravity just like mass does.

It's not a definition or anything, but I like to think of energy as the amount of "capacity to exist" in the universe.

As for the particle-wave duality... It's more a consequence of is thinking there IS a duality. Everything in the universe has "particle" properties like momentum or spin and everything can have wave behaviours like interference. Literally anything. Light has momentum. It can exert pressure. Even mechanical waves (sound) can have particle properties assigned to them (although they're called quasi-particles, because they're not real particles, like an electron). Particles can interfere.

In short, there's no such thing as a "pure" particle or wave, so there's not really any "duality". It's just that for certain interactions, particle-like properties are what we test for, while in others it's wavelike properties. But the point is that WE are selecting this.

It's like a cylinder. It can be a rectangle from one angle. It can be a circle from another. But it's not one OR the other. It's only the fault of how we choose to view it.

It's resonance. Like a musical instrument, different shapes and sizes make certain notes louder. Larger volume - lower note. Smaller volume - higher note.

So as you fill up the glass/bottle/whatever, you decrease the air volume, making the sound pitch up.

No, that's not it for two reasons

One, surface of the water usually just plainly doesn't move fast enough for that effect to take place. And the pitch will change regardless of how fast it fills up.

Two, you get the sane effect from any direction, even behind the bottle. And that's completely illogical for Doppler.

It's just plain old resonance.

People get sunburned walking around or working in the sun.

It's just likely that moving around doesn't present any single part of your body to the sun constantly, and you probably move into shade intermittently.

Fair enough, I only counted the ones for states, not territories.

>For example being 2:00 pm on USA

Where in USA? It has six timezones.

The answer to your question is another question:

How many people will agree for their solar midday (i.e. sun at the highest in the sky) to be at, say 5pm. Timezones are there for people's convenience. Having to account for time zones is something relatively few people have to consciously do, even today. And if they have to, they will usually use UTC as a reference, because it's the reference standard timezones are arranged around.

Even certain countries adhering to am/pm itself just shows what the obstacle would be. You can't have a 4 post meridiem (AFTER MIDDAY) if midday is several hours away. And trying to get them to simply use a 24h clock is an uphill battle, much less accept a time that doesn't align witg their day.

TL;DR It'll be possible to unify the world's time when you, the OP, will happily agree that your sunrise is at 17:00, your midday is at 23:00 and your midnight is at 11:00. Why those times? Because someone else that isn't you decided that their time aligns with solar time, deal with it.