Can you have habitable worlds with red dwarf?

All stars have an habitable orbit where the temperature is good enough for Earth-like biospheres. But temperature is not the only problem here.

Yes.

Stars are so massive it's difficult to wrap your head around how massive they are. Even smaller ones. I don't know if you're familiar with the problem of Mercury's precession, but basically when you're as close to the sun as Mercury is, Newtonian gravity doesn't work right anymore.

Red dwarf stars are not very hot, by stellar standards, since they can only fuse hydrogen into helium and even that they do pretty slowly. So you have to get the planet very close to the star. And a planet that close would experience enormous tidal forces, since the difference in distance between its close side and its far side is so big relatively.

For context, a day on earth gets longer by roughly 2,000 seconds per hundred million years, mostly due to the gravitational effects of the moon. The moon is already tidally locked to the earth. And the ratio in mass of an earth-like planet to a red dwarf is much, much more than the ratio of the moon to the earth.

I'm not exactly the world's greatest expert myself, but I hope that helps.

red dwarves are smaller but also vastly cooler than G and even K class stars

pic related is the habitable zone for proxima centauri

terraforming.wikia.com/wiki/Habitable_Zone

terraforming.wikia.com/wiki/M_-_type_stars

the closer 2 objects are to eachother the stronger their tidal influence on eachother which will progress the planet towards tidal locking significantly faster
technically the earth is also progressing towards tidal locking with both the moon and the sun but neither events will be complete before the sun goes nova

also these stronger tidal forces have an additional issue in that they'll induce significant tidal heating in the planet resulting in a vastly more active geology to the point of actually inhibiting life on its surface.

Get the fuck out.

Right now.

There needs to be some Final Solution camps for little shits like you.

Permanent twilight. Very predictable weather patterns. No seasons. Trees grow tilted towards the star.

The universe is too young to have seen one die yet.

don't forget the perpetual hurricane covering almost 1/4th of the entire planet at the day side
and course while those weather patterns are predictable its along the lines of 24/7 100+mph single directional wind laced with sand particles.
If anything grows its either going to be in zones with relative calm wind generated by terrain or other conditions or else its going to have extremely though barks and heavily anchored root systems capable of enduring that sort of circumstances

Solar flares are going to be a bitch with any planet orbiting a red dwarf.

So you watched Alien Planet: Aurelia as well?

dailymotion.com/video/xkdb8x_extraterrestrial-aurelia_tech

What alternatives are there? Apart from red dwarfs.

Every star has an habitable zone (orbit where there can be an Earth-like planet). However, different stars have different kinds of radiations and gravity that change things significantly. The smaller the star, the closer you have to get. The bigger the star, the farther you have to go.

nah, the hurricane and galeforce winds are fairly common knowledge about the conditions on tidally locked planets, I'll watch it later though

well you've got your regular ol' G class stars like our sun, then you've got the K class or orange dwarves which are smaller, but not to the point of racking up the red dwarf disadvantages while living significantly longer than G class stars and having less ionizing radiation.

At this point it seems like they are in fact the most likely candidates for alien life unless some unknown factors pop up.

On the other end of the spectrum you got the F class yellow-white stars which are just a step up from the G class. They're also not bad candidates for habitation sporting larger habitable zones. Though they do live shorter and are starting to output higher amounts of ionizing radiation.

Beyond that you've got the blue-white A class which is starting to approach the very limits of what could host life. They have immense habitable zones at vast distances but their increasingly shorter lives and higher intensity radiation as well as their increasing rarity make life difficult.
Example of this type of star is Sirius which you might know.

Then we have the B and the O class.
Life around a B would be a spectacular find to say the least and if there's anything living around an O class it was put there by an advanced civilization, they simply live to short a lives for anything to evolve (the largest O class we know of barely live 2-4 million years)

>Century/millenia-long seasons.

ah good ol R136a1
Folks who don't know about it, look that thing up, its insane in every possible way.
The current theory is that its simply to massive to have been formed the regular way and instead is most likely the result of 2 massive O class stars colliding

I guess people would be white as an albino on a planet orbiting a Red Dwarf (virtually no UV).

Meanwhile, a bigger star will have Carbon-black skin for too much UV.

Just make it a moon of a gas giant in the habitable zone.

Well, part of the reason Europeans have such light skin is because our ancestors had a diet very heavy in grain, which doesn't provide much vitamin D, so they needed to get more of it from the sun.

There's a reason Mongolians or the Inuit don't have pale skin.

No. Reasons for this are
>It's cold outside
>There's no kind of atmosphere
>You're all alone, more or less
>You must fly far away from here

that'd have less issues, you'd still have some funky weather systems with prolonged exposure and course quite a bit of darkness when it pops behind the giant and you even have some leeway for how long each rotation takes

that said it needs to be around a Saturn style planet, a moon orbiting a Jupiter or higher type monstrosity will be an irradiated volcanic hellhole

further explanation
>Let me fly, far away from here,
>Fun, fun, fun, In the sun, sun, sun.

>I want to lie, shipwrecked and comatose,
>Drinking fresh, mango juice,
>Goldfish shoals, nibbling at my toes,
>Fun, fun, fun, In the sun, sun, sun,
>Fun, fun, fun, In the sun, sun,

>lol smeg XD
>lol tryhard similes XD
>lol le curry monster XD
>lol teh computer is ment to be smart but it is dumb XD

It's cancerous dogshit. Compare it to something like Yes, Minister or Peep Show or Black Books and it's not even a contest.

KYS plz, cringelords.

...

Confirmed for only watching one episode.

Just because those are good doesn't mean other thing aren't.

Red Dwarf are long lived they are therefore the perfect stop for highly advanced civilization to put habitats in orbit.

en.wikipedia.org/wiki/Habitability_of_red_dwarf_systems