Data scientist, video game analyst, astronomer, and Pathfinder 2e player/GM from Halifax, Nova Scotia.
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Kichae@wanderingadventure.partyto Astronomy@mander.xyz•This Earth-sized Exoplanet is On a Death Spiral2·2 days agotypotyper@sh.itjust.works said in How fast is that in kilometers per hour?: So you’re saying as our own system ages the planets will get pulled in and eaten up.
Not in the same way, no. None of our planets are touching the Sun’s atmosphere in the same way this planet is, and none of them are orbiting at rates that are faster than the Sun’s rotation. If anything, tidal interactions would want to speed up the planet’s orbits, and push them into higher orbits.
But eventually the Sun will become a red giant star, which will change some of these relationships. We will see competing effects then: The Sun will begin shedding its outer layers, which will create a higher drag environment for the planets (that were not swallowed during the Sun’s expansion) which would tend towards inward migration, but this will also lower the Sun’s mass, which will lend itself toward an outward migration.
typotyper@sh.itjust.works said in How fast is that in kilometers per hour?: Would Jupiter being a gas giant get slowed down equally to the outer planets or would it eat some planets on its own.
All of the outer planets are gas giants.
Jupiter is not currently migrating inward, nor are any of the other planets. If inward migration happens after the Sun becomes a red giant, those other outer planets will not get anywhere close to it. As a red giant, the Sun will approximately fill Earth’s orbit. Jupiter’s orbit is 5x larger than this; Saturn’s is 10x larger, and by the time the Sun actually grows this large, all of the planets’ orbits will be even larger than they are today, thanks to gradual mass loss.
None of the outer planets are expected to fall into the Sun at any point in time.
Kichae@wanderingadventure.partyto Astronomy@mander.xyz•This Earth-sized Exoplanet is On a Death Spiral2·2 days agoDwarf stars are technically any star that is in its core phase of life. They are dwarves in comparison to giant stars. The sun is a G-type dwarf star, for instance.
The star is a K-type dwarf, which means it is cooler and smaller than the sun (stars are labelled froom hottest/most massive
coolestleast hot/least massive: O, B, A, F, G, K, and M for historical reasons).Planet formation is a complicated and still somewhat young field of study. Planets being close to their stars was a real shock 20 years ago when we stared finding them. The best models we have for this is planetary migration, where the planets form farther aewy from the star, but friction/drag forces from the nebula from which they formed causes them to slow down and fall into smaller orbits.
This planet continues to see its orbit degrade for even more complex reasons, related to both drag – it is interacting with the star’s atmosphere, which is causing it to slow – and tidal effects. When you’re close enough to a massive, rotating body that the differences in gravitational pull strength due to things like variations in density become significant, the rotating body will force you into an orbit that matches its rotation length. If you’re already orbiting faster than it is spinning, that means it will slow you down. But slowing down will cause your orbit to shrink, which shortens the time it takes you to complete an orbit, which will make the central body slow you down more, which will shrink your orbit, which…
Kichae@wanderingadventure.partyto RPGMemes @ttrpg.network•Hot take: Strongest creatures in the setting shouldn't just be clowned by PCs with no resistance.5·3 days agoWin if you can, lose if you must, but always TPK.
Kichae@wanderingadventure.partyto Astronomy@mander.xyz•This Earth-sized Exoplanet is On a Death Spiral2·3 days agoThe numbers are big, so it can be intimidating, but the math isn’t too bad. It’s a little bit of multiplication and division. The most daunting bit is a cube-root, which you can find on most scientific calculators these days.
It’s hunting down the numbers you need to use that’s the trick, and making sure they’re all in the right units.
The equation for the Roche limit is the most complex math, but that’s just something you look up:
Roche Limit = 2.44 x {the radius of the star} x cube-root(( {the mass of the planet} / {the radius of the planet}^3 ) / ( {the mass of the star} / {the radius of the star}^3 ))
All of the things in the braces are also just values you look up.
Kichae@wanderingadventure.partyto Astronomy@mander.xyz•This Earth-sized Exoplanet is On a Death Spiral7·4 days agoThe paper doesn’t calculate the radius of the star’s Roche limit, instead opting to calculate the orbital period of the Roche limit. I’ve never done a Roche limit calculation for stars, but I have for planets/moons, and I’m not seeing anything that suggests it’s different than for planets. So, I think I did this correctly (excepting typos):
The star’s Roche limit is about 1.5 million km from its centre (~1 million km above its surface), and the planet’s orbit is about 2 million km from the star’s centre. Assuming a circular orbit, which should be the case at these distances, the orbit has a circumference of about 12.7 million km, and the planet is whipping around at a speed of about 2.3 million km/h, or 0.2% the speed of light.
Kichae@wanderingadventure.partytopathfinder@ttrpg.network•pathfinder Isekai - what is your race and ancestry3·6 days agoI’m not up to speed on Japanese cultural or anime concepts, but I thought the idea around Isekai was that you are transported into the game/story world. So, wouldn’t that force you to play Human by definition?
Bingo. Especially when what they’ve done to trigger the comments telllimf them to “play something else” is ask how to extend the thing they already like, or to replace some subsystem that is so clealy not core to the game.
But with 5e, there are also just so many third party releases that you can also replace core systems, like magic, with little difficulty, and people know it.
They don’t want to play something else. They’re not ready to try something else. They want to keep their dragon ampersand and their dis/advantage rolls, and telling them they’re doing something wrong by holding on to that isn’t convincing. It just communicates that other games are played by fucking assholes with boundary issues.
Ok, but these discussions aren’t happening at you’re table. “Well, fuck them then” isn’t exactly helpful.
Aye. NodeBB and Lemmy have a couple of rough edges here and there.
Sute, but the thing they like is “D&D”, and D&D isn’t just a game anymore, it’s an identity signifier. Pointing people to other games before establishing yourself as firmly not attacking their identity is going to trigger a fight.
Kichae@wanderingadventure.partyto RPGMemes @ttrpg.network•A lesson so many need to learn2·10 days agoalexanderthedead@lemmy.world said in A lesson so many need to learn: > Anyone who wants to make the claim that the system is bad will have bang their subjective arguments against the steel wall that is its popularity.
Yes, but this is a thing that people want to do. They want to try and dent that popularity, and they want to shift some of it towards their own preferences. It doesn’t matter that it’s a subjective opinion on what is better or what is bad, it doesn’t feel subjective to the person interjecting.
They believe their preferred game is better, they probably have had this discussion numerous times with people who have ignored them or chewed them out for trying to evangelize, and they are infinitely frustrated that others won’t see the light.
People who leave popular things behind for niche things often just have this habit of having to bury the thing they left behind. It can’t be good. The new thing is better, but the new thing is better both because it is better, and also because the old thing was just objectively bad.
People do this with a lot of things. TV shows, ice cream flavours, toys they used to play with as kids. There’s a sense of shame attached to having liked the old thing, not just a sense of joy of having found the new one. It’s one of the reasons the people they evangelize to get so defensive: They can sense that they are being judged.
Kichae@wanderingadventure.partyto RPGMemes @ttrpg.network•A lesson so many need to learn11·10 days agoBut they definitely can do the thing, because it’s a game of make-believe. Again, this is not hammering in a screw, it’s mental systems for deciding how imaginary doings transpire.
Kichae@wanderingadventure.partyto RPGMemes @ttrpg.network•A lesson so many need to learn01·10 days agoThey didn’t ask the wrong question, though. You’re seeing a solution they do not want and do not care about then blaming them for not listening to the unsolicited advice.
The problem isn’t on their end.
Kichae@wanderingadventure.partyto RPGMemes @ttrpg.network•A lesson so many need to learn31·10 days agoIt’s not on them, though. They didn’t ask if there was a Dragon Age RPG, they asked if they could play Dragon Age in D&D.
Those are different questions.
And here’s the thing. You can’t really tell them “no”, because they know it’s an imagination game where the rules are whatever the table decides upon. They’re not asking if, they are asking how.
Like, there are ways to reditect people, but just ignoring their question to jump straight to their underlying problem when they don’t acknowledge that solution doesn’t open them up to listening. It shuts them down, it makes them defensive, and it ultimatelt makes them hostile to your suggestions.
That’s not “on them”, because that’s a “you’re kind of shit at communicating” problem.
Kichae@wanderingadventure.partyto RPGMemes @ttrpg.network•A lesson so many need to learn41·11 days agoThe thing is, this applies much less firmly to an imagination game where you can easily bolt on a sub-system to do that one thing you wanted to do differently than, say, if someone wants to beat in a screw with a hammer.
And yes, maybe there are people who want to gut their whole game and rebuild it from scratch for some reason, just because they really love sailing on their ship of Thesus, and would be better served by trying a new system. But if they don’t want to do that, someone trying to redirect the conversation in that direction are going to be viewed as hostile and smug, not helpful.
Kichae@wanderingadventure.partyto RPGMemes @ttrpg.network•A lesson so many need to learn7·11 days agoI’ve also found that it’s really easy to convert D&D 3.x and PF1 modules to the system. Not so easy that thought and care doesn’t need to be put into it, but most creatures are based off of the 3e monsters, and there’s a similar philosophy of DC adjustments. So, you get both Paizo’s catalogue of well designed adventure books, as well as a massive back catalogue of classic favourites that you can dig out for a relatively modest effort.
Kichae@wanderingadventure.partyto RPGMemes @ttrpg.network•A lesson so many need to learn3·11 days agoFair. I definitely haven’t engaged with the 5e community to the same extent I have with the PF2 one. I never became a special interest to me the way Pathfinder has.
Kichae@wanderingadventure.partyto RPGMemes @ttrpg.network•A lesson so many need to learn7·11 days agoIt definitely trips up people who usually just look at RPGBot to build their characters out from levels 1 - 20 before the first session. That’s how I made my build choices, and it was a pretty significant stumbling block for me when I made the switch.
The blue options aren’t always the best options, because the best options depend on what everyone else is doing.
Kichae@wanderingadventure.partyto RPGMemes @ttrpg.network•A lesson so many need to learn7·11 days agoExactly this.
The game’s rules are, mostly, simple, intuitive, consistent, and predictable. In fact, the rules very often seem to follow from the fiction presented at the table! Sometimes, they do it too well, even – I’ve seen people complain about Trip being Athletics vs Reflex rather than Acrobatics or Fortitude, but as someone who’s taken judo and karate lessons, Athletics vs Reflex is 100% right.
The rules follow the fiction at the table, and that means 9 times out of 10, if you know the fiction being presented, you can just ask for the roll that makes sense to you. No need to look anything up.
The game is also moderately systematized, and functional. That is, a lot of what 5e DMs would just treat as “roll skill against DC” is formalized into an “Action” with a concrete name. These actions act like mathematical or programming functions, in that they can take parameters. So, it’s not “Trip”, it’s “Trip (Athletics)”. If your character comes out of left field and does something acrobatic, or even magical, that I think would cause a creature to stumble and fall, then I will leverage “Trip (Acrobatics)” or “Trip (Arcana)”, which now makes it an Acrobatics or Arcana roll vs Reflex. This means “Trip (x)” is actually “Roll x vs Reflex. On a success, the target falls prone, on a… etc.”
Super flexible, and super intuitive. But formalized, and only presented with the default option, so it looks both complicated and rigid.
I started running the game for 8 year olds, though, and they picked it up very quickly. I do my best to run sessions totally in-fiction, but that honestly gets broken every other turn or so.
Initiative is a contest to see who gets to act first. It’s not technically a contested check in the usual sense, but it is the only standard situation in the game where people roll against each other to determine a winner.
That’s close enough as far as I’m concerned.
>And when someone is stealthing around they use stealth instead of perception to set their initiative order. > >To stay undetected/unnoticed their initial initiative (based on stealth) is used against the others perception DC or when they use the seek action.
No, that’s the thing, RAW you do not stay unnoticed, only undetected, which means the other side knows you exist. If you beat their DC, they don’t know where you are, but they know that you are.
This is incongruent with how avoiding notice works outside of initiative rolls. That’s the point, and that’s what I think is a Bad Experience, Actually.
>I don’t know how to handle the secret nature of a stealth check in roll for initiative scenarios though.
You don’t. As buffman mentioned, Stealth-based initiative rolls are open. But secret rolls are also one of the most common things to be ejected from the game, so a lot of people outside of PFS have nothing to rectify here.