Hmm. I mean...what's there to discuss? I'd think that you just make an account somewhere else, and that's kinda all there is to it.
Maybe you can set something in your profile on the first lemmy instance to indicate where you went, if you want to have a way to let people know reliably that Account 2 really is Account 1.
There isn't really any mechanism to link accounts natively in lemmy, so not a lot to do in that sense.
I wish MBFC had coverage of The War Zone. TWZ is not very large, but they cite material really well, have informed discussion, and aren't sensationalist. It's great for mainstream coverage of military-related stuff. It's bizarre that it started out on a car website, but it definitely has been one of my more-pleasant surprises online.
Thanks. Bookmarking.
https://en.wikipedia.org/wiki/M2_Browning
The development of the M1921 water-cooled machine gun which led to the M2, meant that the initial M2s were, in fact, water-cooled. These weapons were designated Browning Machine Gun, Cal. .50, M2, Water-Cooled, Flexible.
He's correct. You can fire firearms underwater for the same reason (though you can also destroy weapons doing so, not something to casually do).
That might indicate that this really is a proportional response, the kind that Iran has already signaled they would not retaliate against.
Ehh...Iran said that they would respond against attacks on their "territorial sovereignty" or something similar, if I recall, which would be basically any attack against Iran's territory. I don't think that they said anything about proportionality. At least not that I saw (and I'd been searching Google News and similar repeatedly for a while).
That being said, there's rhetoric and there's action.
Back after the Iranian attack, Netanyahu said something about the people of Iran being free from their regime sooner than one might think or something like that, which could certainly be taken as indication of taking out the Iranian leadership, and unless there's more going on than what's in the news and Israel has announced, I don't think that Israel's trying to topple Iran's government.
But, yeah, we'll see what comes next.
So, couple guesses on my part, prior to information coming in:
If the attack is over -- which I don't know, but I don't think that there'd be a reason to have it run over an extended period of time -- and if these reports as to explosions are accurate, it is probably far smaller than the Iranian attack to which it was a response. That attack included 200 ballistic missiles. On the other hand, if -- and we don't know this yet, though I'm sure it'll be in the news shortly -- Israel actually hit IRGC headquarters, they probably caused more damage and killed more people than the Iranian strike; the missile fired at Mossad's headquarters was inaccurate and hit an area by a nearby road, as I recall, and a number of the missiles were intercepted.
If Israel is aiming to mirror the Iranian attack in particulars, not just targets, the Iranian attack included two waves. I don't know why Israel would do that unless it had something to do with intended damage by Iran, but thought it'd be worth a mention, since knowing when the Israeli attack is complete would be interesting information.
I don't have the familiarity with the matter to say off-the-cuff myself, but there does appear to be an Iranian air base at Shiraz.
https://www.globalsecurity.org/military/world/iran/shiraz.htm
https://www.jpost.com/breaking-news/article-826117
Five explosions were reported heard across Tehran and the nearby city of Karaj early on Saturday morning, according to Iranian media, in what is alleged to be the beginning of an Israeli retaliatory attack on Iran.
A second wave of airstrikes was reported following blasts heard in Shiraz later on early Saturday morning.
I don't immediately know what the significance of those locations are, and there's probably more-detailed information coming shortly, but I imagine that that alone is probably enough to give people who have been looking at the matter an idea of what likely targets were.
EDIT: Oh, wait, missed this bit (or it was added after I initially read the article):
Israel reportedly attacked the location of the headquarters of the Islamic Revolutionary Guards Corps in Iran.
Several of the strikes in Tehran targeted military bases across southern and southwestern Tehran, according to Iranian media.
Reports of explosions at the Imam Khomeini International Airport in the Iranian capital were also received, however Iranian officials denied anything was wrong.
EDIT2: Yeah, apparently they've been updating the article, whether or not that bit was already there.
EDIT3: I didn't look at what-all was known about the intended targets of the Iranian ballistic missile strike a while back, but I do recall that it included Israeli airbases and Mossad's headquarters. Hitting the IRGC headquarters and Iranian airbases would be analogous, I suppose, so that'd make sense if Israel's intent is to have an attack that mirrors the targets of the Iranian attack.
EDIT4: An anonymous Israeli military source was quoted on CNN's liveblog as saying that no energy targets were attacked, only military.
EDIT5: Israel's foreign ministry also announced on Twitter (and probably elsewhere) that they were striking military targets, and I'd take that as more authoritative than whatever anonymous source CNN had.
EDIT6: Barrons reports that "Iran State TV Says At Least Six Blasts Heard Around Tehran", so I guess that gives an idea as to scope.
EDIT7: This has some information as to attack composition:
https://jpost.com/middle-east/iran-news/article-826126
Over 100 planes were involved in the attack on Iran on Saturday, including the cutting-edge F-35.
Israel’s preliminary strike on radar targets in Syria was aimed at “blinding” Iran’s capabilities, quickly escalating into an offensive targeting Tehran and Karaj, Iran’s capital and another strategic location.
The IDF confirmed the operation focused strictly on military targets, steering clear of nuclear and oil facilities to prevent wider conflict escalation. High alert remains as Israel anticipates potential retaliation, not only from Iran.
This large-scale assault involved over 100 aircraft, including F-35 “Adir” stealth fighters, covering approximately 2,000 kilometers. According to foreign reports, strikes focused on Tehran and Karaj, with the IDF stating that each wave targeted military sites exclusively, mitigating further conflict risks.
EDIT8: CNN reports that Israel says that the attack is complete.
I mean, there's a cost-benefit thing here.
kagis
Take, as a random example, Dagsboro, Delaware, population 805.
Do you really care much about the town admininistrator there? Enough to expend Chinese resources on it that could be working on other things?
Once fired, the bullets would just retain their muzzle velocity.
I don't know what kind of muzzle velocity increase would happen -- no air means that they'd be moving somewhat-faster. I'd think that that'd depend on a number of things, probably fluid dynamics and stuff. But maybe you can back-of-the-napkin it by figuring that any acceleration is roughly bounded by the energy required to accelerate the mass of air involved to muzzle velocity. I don't know exactly how much air that is. Certainly the air inside the barrel, but also some of the air outside the muzzle.
https://en.wikipedia.org/wiki/Density_of_air
Air has a density of approximately 1.225 kg/m 3 (0.0765 lb/cu ft)
https://oow-govmil.com/firearms/50-m2hb-qcb-2/
Barrel Length – 45 inches (114.3 cm);
https://en.wikipedia.org/wiki/.50_BMG
Bullet diameter: 12.98 mm (0.511 in)
So that's about (.511/2)^2*3.1415*45 =9.22850 in^3, or 0.00015122811 m^3, so .00018525 kg, so 0.1g of mass of air in the barrel.
https://barrett.net/products/accessories/ammunition/50bmg/
Bullet Weight: 661 gr
~15.4g per grain, so ~43 grams. So I figure that the mass of the air in the barrel probably isn't a huge factor, and I don't know how to compute the effective amount of air that needs to be accelerated outside the barrel and how much...that's probably a fluid dynamics question .
Let's just say that it's three times that amount of air. Even if so, that's a pretty miniscule factor compared to the mass of the bullet, like under half a gram. So I figure that the muzzle velocity probably isn't all that much higher in space.
Are we moving fast enough to do much in terms of orbit change?
https://en.wikipedia.org/wiki/Low_Earth_orbit
The mean orbital velocity needed to maintain a stable low Earth orbit is about 7.8 km/s (4.8 mi/s), which translates to 28,000 km/h (17,000 mph). However, this depends on the exact altitude of the orbit. Calculated for a circular orbit of 200 km (120 mi) the orbital velocity is 7.79 km/s (4.84 mi/s), but for a higher 1,500 km (930 mi) orbit the velocity is reduced to 7.12 km/s (4.42 mi/s).[10] The launch vehicle's delta-v needed to achieve low Earth orbit starts around 9.4 km/s (5.8 mi/s).
https://www.gd-ots.com/wp-content/uploads/2017/11/M2HB-50-Caliber-Heavy-Machine-Gun.pdf
Muzzle velocity: (M33) 3,050 feet per second (930 meters per second)
Hmm.
Depending on T/W and other factors, delta V to LEO can vary. But once you've reached LEO, gravity loss and atmospheric drag are no longer factors. So I'll give you some delta Vs going from a 300 km altitude circular orbit to higher altitude orbits.
300 km to 500 km - .11 km/s
300 km to 1000 km - .38 km/s
300 km to 2000 km - .83 km/s
300 km to 4000 km - 1.51 km/s
300 km to 8000 km - 2.37 km/s
300 km to 16000 km - 3.22 km/s
300 km to 32000 km - 3.83 km/s
300 km to 64000 km - 4.1 km/s
300 km to 128000 km - 4.13 km/s
300 km to 256000 km - 4.02 km/2
300 km to 512000 km - 3.87 km/s
300 km to 1024000 km 3.72 km/s
So, the International Space Station is at 340 km. So figure that our astronaut is acting as gunner on a vehicle in LEO at 300 km, can use the above table.
The upper end of LEO is 2000 km.
So you've got about 1 km/s in terms of delta V to work with there. So if our astronaut is acting as roof gunner on a Humvee in LEO, that's actually quite a lot of ability to reach. Given sufficiently-accurate aim, and maybe willingness for a bullet to do a sufficient number of orbits before it collides with a target, he's got the range to hit anything in low earth orbit.
He can't hit GPS/Galileo/GLONASS satellites (19k km to 23k km). And he can't hit escape velocity, so that Model S that Elon Musk launched into an eccentric path wandering the solar system is probably safe. But he can hit a lot of stuff.
Okay, the image is of the Moon. How about acting as a gunner there?
https://nssdc.gsfc.nasa.gov/planetary/factsheet/moonfact.html
Escape velocity: 2.38 km/s
No. From the surface of the Moon, his bullets are going to come back to the Moon. So he can fight lunar battles, but he can't be engaging targets on other celestial bodies or in their orbit, like the Earth.
I suppose that's fair.
Most of the time, one can find an alternative via lemmyverse.net, which runs a spider and builds a searchable list of all communities on all instances.
https://lemmyverse.net/communities
A Threadiverse-wide community search isn't not something that lemmy makes available, and it's not immediately obvious to new users.
Sometimes, the community name is different -- I was in a discussion the other day where two people were talking about an alternative for "crows", and I pointed out that there's !corvids@sopuli.xyz. And I mentioned that there's no direct "mechanicalkeyboards" equivalent, but that !ergomechkeyboards@lemmy.world does have some overlap. A lot of times, though, there are communities with the same name on different instances, like !linux@lemmy.world, !worldnews@lemmy.world, or !asklemmy@lemmy.world, and so a search on lemmyverse.net will turn them up.