Speculoos-2c: A new potentially habitable earth
news.uliege.be
news.uliege.be
I like silly backronyms like that[0].
Saying Trappist is a type of beer is like saying French is a type of poodle — if you used the label only to refer to a poodle bred in France.
A more apt comparison is saying Bordeaux is a type of wine. Bordeaux is a region in France; it is well-known for 5-6 types of wine; any Bordeaux wine that qualifies for AOC proudly displays its Bordeaux heritage on the bottle.
https://www.foodandwine.com/news/russia-champagne-law-sparkl...
(I see myself out now.)
[0] Not "begs". Never "begs the question," even if I am being pompously pedantic. [0']
[0'] https://en.wikipedia.org/wiki/Begging_the_question#Vernacula...
[1] https://en.wikipedia.org/wiki/Poodle [1']
[1'] TIL the word "cynalogy"--"the study of matters related to canines or domestic dogs." https://en.wikipedia.org/wiki/Cynology
[2] Also, while the Germans refer to the breed as "Pudel," the French call them "Caniche". So of course in English we call them <"French"> <German word>.
[3] Rabbits! They went down this hole!
Ok I guess in English the correct term is indeed 'trappist beer', but in Dutch 'trappist' is used to refer to the beer as well as the monk/nun; there's a lot more talking about beer than about those monks obviously, so you can imagine that for me 'trappist' means 'beer' no matter what language so pardon my linguistic mistake :)
I would even call it the default cheese, though like many cheeses it was apparently invented in France:
That's assuming there isn't a cycle from freezing to boiling every 2.73 days.
Training your mind to find patterns everywhere can be fun, unless you get QAnon out of it. Or, IMHO, religion that influences states or bothers non-followers. Contrast the good things, though: The aforementioned authors shows in Unsong that "Harry Belafonte - There's a Hole in the Bucket" is actually about the singluarity in AI/AGI development.
“Erica,” said Ana calmly, “you’re going about this the wrong way. When Aaron is like this, you can’t argue against him. You have to beat him at his own game.”
“What?”
“For example,” said Ana, “Aaron, I propose that the Chevy does not represent the Tribe of Levi, but rather the Tribe of Issachar.”
“Huh?” I asked. “Why?”
“Because,” she said, with an ethereally beautiful smile, “a Chevy is a car.”
“AAAAARGH!” I said. “AAARGH AAAAARGH AAAARRGH AA – ouch!”
Come to think of it, most major religions don't treat the earth as something special for humans. In the Abrahamic faiths it's specifically not our natural home, which is why we have so many issues. In the Hindu faith, from what I understand, it's also a place of suffering we are ultimately trying to escape. Buddhism also has much the same view.
So I'm gonna guess... half?
(Double-check: this planet is about 1/50 as far from its sun as earth is from our sun, and its sun has about 1/7 the radius of our sun. That would give a rough estimate of the relative size of that sun in the planet’s sky of 50/7, so say 7 times as large as our sun is to us)
I would call that large, but not enormous.
(This ignores effects on perceived size of differences in the light spectrum and brightness of the two stars and differences between the atmospheres of this planet and earth)
YMMV, since it's all opinion and conjecture right now.
But in general I wouldn't expect much wind. The hot side is in vacuum because the only volatiles there are the ones just baked out of the fried ground or perhaps some volcanic activity, and the cold side is in vacuum because everything's frozen, and if there is some tiny pressure gradient you'd never notice the resulting "wind" as the vacuum flows past you, probably at rates roughly comparable to what the ISS experiences as "wind" in its low Earth orbit.
This is no more earthlike than Mars.
All moisture would naturally migrate to the dark side and freeze there, permanently, if it doesn't sublimate away into the vacuum left after all the air is blasted off the day side.
That sounds like a cool sci fi setting
I wonder if we could extract energy in other ways, like using the cold side for data centers (cheaper AC), or large pipes to extract the moisture from the cold side and heat it in the day side, to generate energy.
But with the prices on solar in recent years, I think that’s mostly discarded.
With enough atmosphere, like Venus, and some libration, I guess you might be able to get convection cells going enough to distribute heat. But really, the galaxy is absolutely lousy with planets. if you are equipped to get there at all, there is no need to make do in a hellhole.
All of these dim-star photosphere-hugging planets are an artifact of how we are obliged to find them. There are certainly myriads of planets that just need a half-billion years with some algae to become idyllic vacation spots.
I mean, the ethics of commiting your descendants to life aboard a generational ship is very sketchy.
Though, by the time we figure out how to do that, "we" probably won't be purely biological, naturally evolved beings any longer.
I can leave say when i'm 60 and hopefully reach star at age 70. Trade-off I'm willing to do
Haven't you heard? Dark matter doesn't exist [1]
Off to the stars!
[1] https://scitechdaily.com/dark-matter-may-not-exist-these-phy...
I don't think this is 100% the case. Most deserts on Earth actually have a relatively large variety of life in them -- even the most desiccated deserts will often have at least bacteria of some sort living in them.
Cool that we're finding interesting planets though! An actually human-habitable planet would, I think, have a significant cultural impact here on Earth.
I wonder what happens if a human child grows up in a 2.5g environment. I imagine they grow up to be short, stocky, and extremely muscular.
Adaptation probably plays a big role here. If you give a 150lb person a suit that weighs 225 lbs and tell them to wear it all the time, they probably give up after a few days. But if you tell a 150lb person to eat more until they're 375lbs, their body has time to adapt.
Since the new planet is 100 light years away, even at the speed of light we're talking about a 100-year journey minimum. Maybe the generation ship used to make the journey could use artificial gravity to smoothly transition from 1g to 2.5g over the course of 100 years. Loading the ship with people who are stocky & muscular is another option.
I don't think living in enhanced gravity needs to be terrible. Astronauts have to exercise more in order to maintain fitness in low-gravity environments. It appears to follow that if you're living in an enhanced-gravity environment, you can get away with exercising a lot less and still maintain fitness :-)
Muscles and bone density will need to increase, but we do that as part of adaptation, evolution will favor the trait long term but regular use will already compensate in part or totally the need.
Possibly ankles and knees will need to get stronger as well
Apparently surface gravity is proportional to mass/radius^2 [0]
Assuming constant density as per the grandparent, the mass increases with the cube of the radius.
Which simplifies to surface gravity being proportional to the radius of the planet.
g ~ density x radius [0]
Red dwarfs are known for flares that would destroy the atmosphere of any nearby planet.
"Although this planet orbits very close to its star, at a distance about 10 times shorter than that of Mercury around our Sun, the amount of stellar irradiation it receives is still low... the star LP 890-9 is about 6.5 times smaller than the Sun and has a surface temperature half that of our star."
Live on the other side? or a narrow habitable band between the 2 hemispheres
You could pick a planet where the noonday sun is not too hot, but then the ice would be even further away.
Noplace on Earth is so dry that people are tempted to collect ice from Antarctica, even with shipping today cheaper than it has ever been.
There's a table in that link of how much reaction mass is needed to reach orbit. At 1.5g it requires about 500% as much rocket as Earth. At 2.5g the number is ... much larger.
Volume scales cubically, yes. And therefore, also does the gravitational pull by the object at the same distance to the center. But due to the larger radius, you are also further away. Gravity respects the inverse square law. This means that the surface gravity of an object that maintains the same density increases linearly with the object's size.
In other words, you would have 1.36g on the planet's surface, not 2.5g. But that's assuming same density. Even within our own solar system this is not true: Mars's surface gravity is 0.38 of earth's gravity but 0.53 of earth's radius. The gravity is lower than it would be if Mars had the same density as earth.
I wonder if you feel centrifugal force spinning that fast around a sun?
It does actually affect your weight a bit, but if you mean what I think you mean that it would be something you perceptibly feel, it is not.
Moreover, this merely shows that the idea that the magnitude is significant isn't a good one. Even more importantly, you don't "feel" anything in an orbit ever, because when you're on a geodesic, you're in "zero g". You never "feel" anything in an orbit, no matter how fast it is. People on the ISS don't "feel centrifugal force", because they're in zero G.
(Except tides, if you're large enough, but a single person in this orbit is nowhere near large enough or sensitive enough to feel any tides.)
Centrifugal force is proportional to the radius, so a smaller radius actually decreases it, for the same angular velocity. The reason we associate smaller radiuses with increased force is actually because if the energy stays the same, reducing the radius increases the angular velocity (like in a pirouette), which then “feels” like a stronger force.
Wondering what the follow up opportunities to study this more are coming up.
1: Known as speculaas in Dutch.
> TRAPPIST (TRAnsiting Planets and PlanetesImals Small Telescope) is a project led by the Origins in Cosmology and Astrophysics group (OrCA) of the Department of Astrophysics, Geophysics and Oceanography (AGO) of the STAR Institute of the University of Liège (Belgium).
Sci-fi names tend to be tiresomely similar since they overuse gods names and anglocentric concepts