egg changed the topic of #principia to: Logs: https://esper.irclog.whitequark.org/principia | <scott_manley> anyone that doubts the wisdom of retrograde bop needs to get the hell out | https://xkcd.com/323/ | <egg> calculating the influence of lamont on Pluto is a bit silly…
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<queqiao->
⟨_zavian_⟩ In the past (without principia), I have definitely warped right past a 40km Earth/Kerbin periapsis with a loaded craft on multiple occasions without ksp even noticing the atmosphere, so I wouldn't be surprised if KSP would warp right through the moon as well.
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<queqiao->
⟨daverec1525⟩ That’s still a thing in stock KSP without principia, at least if one time warped while playing another vessel or time warping at KSC. Then the 40 km Pe craft will zoom through the atmosphere as if there’s none. Very different story if that Pe was negative.
<queqiao->
⟨daverec1525⟩ +(including debris)
<queqiao->
⟨daverec1525⟩ * _while_ playing another vessel or time warping at the
<queqiao->
⟨daverec1525⟩ +In a way, due to that stock KSP detail, I’ve learned that if I wanted to deorbit an orbiting debris, its Pe had to be negative, not simply be within the atmosphere.
<queqiao->
⟨daverec1525⟩ * debris), during on-rails time warp at least,
<queqiao->
⟨daverec1525⟩ * ‘on-rails’
<queqiao->
⟨_zavian_⟩ I my case, I have warped right through the atmosphere wuith multiple active craft. I can't recall it happening with any craft warping through the ground, but I wouldn't be surprised if stock KSP allowed it, provided the altitude before and and after tick was positive. (ie you go through the moon in one tick).
<queqiao->
⟨_zavian_⟩ * with multiple active craft (without principia).
<paculino>
https://archive.ph/p6EVx And the solar system's boundary is extended once again, this time thanks to n-body magic
<queqiao->
⟨thebigdoi⟩ How would this even be possible?
<queqiao->
⟨thebigdoi⟩ That's the only article I can find on the matter
<queqiao->
⟨test_account9540⟩ maybe if these planets are already on about the same galactic orbit as the sun 🤔
<queqiao->
⟨thebigdoi⟩ Though 3.8 light yaers is extremely far
<queqiao->
⟨thebigdoi⟩ * ~yaers~years
<queqiao->
⟨thebigdoi⟩ * years
<paculino>
It would be like reaching earth from another planet by using one of the lagrange points with the moon, rather than using them to reach the moon from the earth
<queqiao->
⟨thebigdoi⟩ Though 3.8 light years is extremely far
<paculino>
Right?
<queqiao->
⟨thebigdoi⟩ Yeah possibly would be facisnating to see the orbit of one of these rogue planets
<queqiao->
⟨thebigdoi⟩ Ksp interstellar could be upgraded 🤣
<queqiao->
⟨clayel⟩ itd be an interesting story mode for rp-1 in 5 years time
<queqiao->
a rogue planet is going to crash into earth in 200 years, you need to find another habitable planet in another solar system before that hapens
<queqiao->
⟨clayel⟩ * happens
<queqiao->
⟨test_account9540⟩ much easier to deflect that rogue planet
<queqiao->
⟨thebigdoi⟩ Depends how big the rogue planet is
<queqiao->
⟨test_account9540⟩ if you manage to detect it 200 years before it hits, it should be possible to deflect in any case i think
<queqiao->
⟨thebigdoi⟩ Possibily but not with the technology we have now
<queqiao->
⟨test_account9540⟩ with current technology they aren't even detectable...
<queqiao->
⟨thebigdoi⟩ Ah, thanks
<queqiao->
⟨thebigdoi⟩ Planets some light years away are detectable with current technology
<queqiao->
⟨test_account9540⟩ when they are orbiting starts
<queqiao->
⟨test_account9540⟩ * stars
<queqiao->
⟨test_account9540⟩ it's not the planet that is detectable, it's the changes in starlight due to the planet
<queqiao->
⟨test_account9540⟩ a rogue planet is something completely invisible atm
<queqiao->
⟨thebigdoi⟩ Ah, yeah your right my bad, forgot that they need to be orbiting stars
<queqiao->
⟨thebigdoi⟩ I wonder if any have come close or are already captured but we just don't know about it
<queqiao->
⟨raptop | ²³⁹Pu powered⟩ Well, there's direct imaging of planets that are sufficiently massive and young in NIR/MIR
<queqiao->
⟨test_account9540⟩ again, we see reflected starlight
<queqiao->
⟨raptop | ²³⁹Pu powered⟩ While a starshade type mission would, by in large those images you've seen of eg: HR8799 are using emitted light. This is also part of why typical ground based direct imaging systems can't see planets less massive than ~2 Jupiters
<queqiao->
⟨test_account9540⟩ hmm, interesting... and still, again, these planets can only be so hot that we see _their_ light because a star is heating them 🙂
<queqiao->
⟨raptop | ²³⁹Pu powered⟩ The literature also has a lot of of "sub brown dwarfs" and "spectral class Y" stars, because the actual boundary between a low mass brown dwarf and a planet is fuzzy.
<queqiao->
⟨raptop | ²³⁹Pu powered⟩ It's more heat of formation
<queqiao->
⟨raptop | ²³⁹Pu powered⟩ The planets that have been found by direct imaging have to date all been quite distant from their host stars . Assuming EPRV (and to a much more limited extent transits) doesn't find everything that could be a target for HWO (it might not!), then we get some amusing bits with close in blue dots.
<queqiao->
⟨test_account9540⟩ How these things even formed. Something tells me they didn't form like planets do, but are rather failed stars
<queqiao->
⟨raptop | ²³⁹Pu powered⟩ Could be core-accretion, (ie: rocky/icy pebbles -> vacuum up gas in a region of the disk once it gets massive enough), could be disk instability (a chunk of the disk directly collapsing). The boundary between these two formation pathways doesn't have to be at the 13 jupiter mass that's normally used to define brown dwarfs. I'm also not 100% up on the latest in planet formation, and if anything that's been...
<queqiao->
... directly imaged has an eccentric enough orbit to have been kicked out there instead of forming in-situ.
<queqiao->
⟨test_account9540⟩ Or simply would-be binary stars that didn't grow big enough to quality as stars?
<queqiao->
⟨test_account9540⟩ * qualify
<queqiao->
⟨raptop | ²³⁹Pu powered⟩ Eh. Stars form by direct collapse of gas clouds, and get to the protostar state quickly (few thousand years). For binaries, etc, roll the dice on fragmentation.
<queqiao->
⟨qazerowl⟩ We have taken images of exo planets
<queqiao->
⟨qazerowl⟩ * direct images of exo planets. But yes we need their reflected starlight.