Halcyonic Planets and the End of the Solar System

When the Sun becomes a red giant, it will destroy Mercury, Venus, and Earth. After that, it will become a white dwarf.
But what happens next? When will the Sun become a white dwarf? Will Earth be destroyed? Can planets exist around white dwarfs?
This is the 2nd episode of my Halcyonic Systems series, where I talk about planets around white dwarfs.
If you enjoy, please like and subscribe
Footage in this video taken using Space Engine

[@godslayer9000]

Never heard of Sedna, went to the wiki page. Learnt about it, saw a cool-looking word in blue, clicked it, repeat about 7 times. 1h 33m and a tour of the solar system later I close the wikipedia tabs and get jumpscared by this video, still paused on 2:32. Thank you for the field trip.

[@AlfallMap]

So next are blanets? Also, speaking of blanets, their definition (according to Wikipedia) is "a member of a hypothetical class of exoplanets that directly orbit black holes" Rogue planets don't orbit stars, they orbit the central black hole, Sgr A*, so that technically makes rogue planets a class of blanet, unless "blanet" applies to objects that form near the specified black hole. Also also; Blomets (Black hole comets) Dwarf blanets Minor blanets Blasteroids (Black hole asteroids)

[@Kyplanet893]

probably gonna do red giants first since there’s not much to talk about black hole planets (since we don’t have any examples of them yet)

[@Flesh_Wizard]

Blasteroids is the coolest name I've ever heard

[@FHT1883]

🅱lanet

[@Mohamedamin886.m]

​@@Kyplanet893correction from video sun will enter red giant branch 7,1 billion years because subgiant branch length is 2billion years subgiant branch will start at 5b years

[@mg4361]

​@@Flesh_Wizard sounds like a severe case of hemoroids

[@capitallunar4053]

Good video! Is it possible to create one about hypothetical objects like white holes or black dwarves?

[@Kyplanet893]

maybe

[@Asterism_Desmos]

2:35 the distant descendants of WD-40 motor oil lol

[@izzylandyt]

Hey y’all I actually live on one of these Halcyonic planets. Come on by!! Make sure to bring a flashlight!!

[@Novenae_CCG]

0:15 "will slowly drift away, as the weakened gravity of the dead sun will no longer be strong enough to hold them." Why does the gravity get weaker? Does the sun's mass just disappear? It thought it's mass would just be in a different form, as the sun fuses heavier and heavier elements until it can no longer do so, and thus the sun dies, but that doesn't mean that matter literally vanished. So the idea of the sun's gravity getting weaker confuses me. EDIT - 2:14, okay, that's what I thought. They _don't_ drift away. So now I'm even more confused by the prior statement.

[@Kyplanet893]

the sun will eject about half of its mass into space and out of the solar system when it becomes a white dwarf

[@Kyplanet893]

about the area at 2:14, they drift away in the sense that their orbits will become further away from the sun, they won’t leave the solar system entirely

[@Novenae_CCG]

@@Kyplanet893 Okay, thanks for the clarification!

[@WinVisten]

I myself call "halcyonic", formerly Earth-like planets "Postgaian" planets, which I honestly sounds more straightforwards and it's less likely you'd need to explain what it means. I got the term from Orion's Arm, which is a hard scifi world-building project. I think you should look it up.

[@Bruhza5870]

Can habitable planets orbit white dwarfs

[@Kyplanet893]

why not

[@notjebbutstillakerbal]

​@@Kyplanet893 they'd have to be so close that the planet would be tidally locked

[@generalrubbish9513]

In theory, white dwarfs are the most stable stars in the universe. Since they're no longer "active" per se, they don't flare or eject blasts of charged particles, and they're estimated to take TRILLIONS of years to cool down into black dwarfs that no longer radiate any energy - for comparison, the universe is only 13.8 billion years old, meaning it is impossible for any black dwarfs to exist for a long, long time yet. With that in mind, finding a habitable planet in orbit of one might not be likely but if you built an artificial habitat around a white dwarf, that could guarantee humanity's survival long after the last main sequence star has died.

[@legov37]

Love the name! Gonna be using Halcyonic from now on

[@Flight368]

It sounds so… scientific

[@bijan9116]

I would imagine an interaction between newly formed halcyonic solar planets and the original planets going something like: “Heya old-timers, how’s it going?” Mars: “Why am I still here? Just to suffer?” Outer planets: “Can’t see sh*t.”

[@saviourojukwu893]

It happens in 5.4 billion years time

[@saviourojukwu893]

Having a habitable planet around a white dwarf dosen't seem impossible

[@ldubt4494]

​@@saviourojukwu893 yes but having a planet reform in that small habitable zone is very lucky.

[@saviourojukwu893]

@@ldubt4494 yeah

[@Mohamedamin886.m]

​@@saviourojukwu893in 5b years the sun will subgiant branch in 7,1b years sun will enter red giant branch

[@SecureBirch410]

Ive got my calender set

[@julianodobler2782]

I wonder if its possible for a white dwarf to capture a Earth-sized rogue planet and keep it around (specially in the HZ). How would its orbit be around the stellar remnant? High inclined and retrograde (like Triton around Neptune) or more "earth-like" (a prograde, eyeball planet) due to tidal forces?

[@drolemem]

It would have to be tidally locked in order to be in a white dwarf's hz

[@abxy_real_official_since2020]

You can't forget the white dwarf WD 40

[@meeatworld]

Dont know about it but i bet it wont rust

[@bananaspice1967]

See you all in a couple billion years.

[@koharumi1]

Yay fahrenheit If possible can you include the metric units onscreen too?

[@emperorvitiate1844]

Grim and frostbitten kingdoms

[@Flesh_Wizard]

Are any of these white dwarves as useful and versatile as WD-40?

[@Kyplanet893]

yes you wont need to use any wd 40 if you put a white dwarf on earth

[@Flesh_Wizard]

@@Kyplanet893 thanks! I now know what I need to use to unstick my Lego

[@notjebbutstillakerbal]

Earth would become mere atoms if it crashed into a white dwarf

[@Spring2345]

Interesting video, it was even cut quite well, keep up the good work!

[@KittenplutoComparisons]

So pollux b is a halcyonic planet

[@Kyplanet893]

there’s evidence that thestias doesn’t exist but if it does yes

[@YourEarthshorts]

Mobs Despawning Be Like Space Edition:

[@alexrator7674]

kypickle

[@Kyplanet893]

that’s me

[@TheDaneTV]

@Kyplanet and now everyones favorite subject math

[@oberonpanopticon]

@@Kyplanet893my god, you turned yourself into a pickle you’re pickle kyplanet

[@notjebbutstillakerbal]

​@@TheDaneTV *;#"&(2" × 4 =

[@colleenforrest7936]

Ceres is our life raft! 😅

[@notjebbutstillakerbal]

Same with Europa, Callisto, Enceladus and Titan

[@johnellis5828]

Sun = brown* dwarf.

[@Kyplanet893]

no i don’t think so

[@notjebbutstillakerbal]

The sun is a G2v yellow dwarf

[@RedOctober_]

No…stars can’t turn into brown dwarfs that’s not how it works

[@MDE_never_dies]

That’s not how this works. That’s not how any of this works.