Apologies again for today’s post being largely the republication of other essays but looking after our guests is, as it should be, taking first priority.
The first one was something I read on the Cliff Mass weather blogsite. It was a forecast as to which of the lower US 48 States would remain habitable. It opens:
Will the Pacific Northwest be a Climate Refuge Under Global Warming?
As global warming takes hold later in the century, where will be the best place in the lower 48 states to escape its worst effects?
A compelling case can be made that the Pacific Northwest will be one of the best places to live as the earth warms. A potential climate refuge.
and offers this conclusion:
So what conclusion does one inevitably reach by studying the IPCC reports, the U.S. Climate Assessment, and the climate literature?
The Northwest is the place to be during global warming.
Temperatures will rise more slowly than most of the nation due to the Pacific Ocean (see below)
We will have plenty of precipitation, although the amount falling as snow will decline (will fall as rain instead). But we can deal with that by building more reservoir and dam capacity (and some folks on the eastern slopes of the Cascades have proposed to do exactly that).
The Pacific Ocean will keep heat waves in check and we don’t get hurricanes.
Sea level rise is less of a problem for us due to our substantial terrain and the general elevation rise of our shorelines. Furthermore, some of our land is actually RISING relatively to the sea level because we are still recovering from the last ice age (the heavy ice sheets pushed the land down and now it is still rebounding).
There is no indication that our major storms…cyclone-based winds (like the Columbus Day Storm)… will increase under global warming.
Increased precipitation may produce more flooding, but that will be limited to river valleys and can be planned for with better river management and zoning.
The second item was this:
Antarctica’s Point of No Return
POTSDAM – Recent satellite observations have confirmed the accuracy of two independent computer simulations that show that the West Antarctic ice sheet has now entered a state of unstoppable collapse. The planet has entered a new era of irreversible consequences from climate change. The only question now is whether we will do enough to prevent similar developments elsewhere.
What the latest findings demonstrate is that crucial parts of the world’s climate system, though massive in size, are so fragile that they can be irremediably disrupted by human activity. It is inevitable that the warmer the world gets, the greater the risk that other parts of the Antarctic will reach a similar tipping point; in fact, we now know that the Wilkes Basin in East Antarctica, as big or even bigger than the ice sheet in the West, could be similarly vulnerable.
There are not many human activities whose impact can reasonably be predicted decades, centuries, or even millennia in advance. The fallout from nuclear waste is one; humans’ contribution to global warming through greenhouse-gas emissions from burning fossil fuels, and its impact on rising sea levels, is another.
Indeed, the latest Intergovernmental Panel on Climate Change (IPCC) report stated, in uncharacteristically strong terms, that the sea level is “virtually certain” to continue to rise in the coming centuries or millennia. Moreover, the greater our emissions, the higher the seas will rise.
Simply, because the quicker that the awareness of the critical challenges ahead becomes widespread knowledge, right around the world, the quicker that there will be political movements to change our relationship with our planet.
It’s never about not needing governments, it’s always about needing the right sort of governments.
Yesterday, I published a post under the title of Just to focus our minds. It featured a chart that demonstrated how long Planet Earth would take to ‘recover’ if the human race disappeared today.
Why today’s post seemed a perfect companion was because it explores how we could think better. For if the human race doesn’t quickly find a way to think better, then that aforementioned chart may not be such an academic abstract after all.
The post is more or less a copy of what appeared on the Big Think blogsite, a site I have been following for some time now.
ooOOoo
Want to Make a Difference in the World? Think Small
Stephen Dubner
Ambition can work against you by leading you to set unrealistic and overwhelming goals. Want to make a difference in the world? Think small. It’s much less complicated, you’ll have easier access to the data that you’ll need. Most importantly, you will preserve one of your most precious resources: optimism.
Having the will to attack an issue at its root—from launching a socially conscious business to demanding more green spaces in your neighborhood—requires energy and enthusiasm to see the project through. By being less ambitious in your plans you’re more likely to stick with them and be successful.
Besides, when you first developed your problem-solving skills you were small—a child. Stephen Dubner, the co-author, with economist Steven Levitt, of Freakonomics and Think Like a Freak, wants you to go back to that way of thinking:
One of the most powerful pieces of thinking like a child that we argue is thinking small. So I realize that this runs exactly counter to the philosophy of the arena in which I’m appearing which is thinking big, Big Think, but our argument is this. Big problems are by their nature really hard to solve for a variety of reasons. One is they’re large and therefore they include a lot of people and therefore they include a lot of crossed and often mangled and perverse incentives. But also a big problem – when you think about a big problem like education reform. You’re dealing with an institution or set of institutions that have gotten to where they’ve gotten to this many, many years of calcification and also accidents of history. What I mean by that is things have gotten the way they’ve gotten because of a lot of things a few people did many, many years ago and traditions were carried on.
Want to break those traditions and build something new and forward-thinking? Then curb your ambition. Start to look at the world again with the eyes of a child.
Stephen Dubner talks about [that YouTube link reveals the transcript of the talk. PH] the importance of thinking small in order to tackle some of the world’s biggest problems piece by piece. Dubner is the co-author of Think Like a Freak
ooOOoo
Stephen Dubner and economist Steven Levitt co-authored the book Freakonomics. If you are interested, the Freakonomics website is here.
The second, and last, episode of the BBC Clouds Lab programme offers an intriguing message.
On Monday, I published a post under the title of The clouds above us. The second episode demonstrated that even in atmospheric conditions of near vacuum, intense cold and very low humidity, conditions that would kill a human in seconds, there was microscopic bacteriological material to be found.
Exploring the troposphere
The troposphere is a turbulent layer of air that begins at the Earth’s surface and ranges from 23,000-65,000 feet above sea level, depending on the latitude, season and the time of day. Its name originates from the Greek word tropos, meaning change. It’s now known that bacteria actually exists in clouds and scientists believe that it plays a significant part in the creation of rain but little is known about life higher up. Microbiologist Dr Chris Van Tulleken has discovered that living bacteria can exist well above 10,000ft in a hostile environment with low pressure, increased UV radiation, freezing temperatures, high winds and no oxygen or water.
What I took away from watching the programme was that the minimum conditions necessary for living bacteria were far more harsh than one might expect. In other words, finding living bacteria in other solar systems might not be such a science-fiction idea.
With that in mind, I’m republishing an essay that Patrice Ayme wrote in 2013. I’m grateful for his permission to so do.
ooOOoo
40 Billion Earths? Yes & No.
Up to twenty years ago, a reasonable opinion among scientists was that there might be just one solar system. Ours. Scientists like to project gravitas; having little green men all over didn’t look serious.
However, studying delicately the lights of stars, how they vary, how they doppler-shift, more than 1,000 planets have been found. Solar systems seem ubiquitous. Astronomers reported in 2013 that there could be as many as 40 billion habitable Earth-size planets in the galaxy. However, consider this:
Centaurus A: Lobes Of Tremendous Black Hole Explosion Fully Visible.
Yes, that’s the center of a galaxy, and it has experienced a galactic size explosion from its central black hole.
One out of every five sun-like stars in our galaxy has a planet the size of Earth circling it in the Goldilocks zone, it seems — not too hot, not too cold — with surface temperatures compatible with liquid water. Yet, we have a monster black hole at the center of our giant galaxy, just like the one exploding above.
The Milky Way’s black hole is called Sagittarius A*. It exploded last two million years ago. Early Homo Erectus, down south, saw it. The furious lobes of the explosion are still spreading out, hundreds of thousands of light years away.
We are talking here about explosions potentially stronger than the strongest supernova by many orders of magnitude (depending upon the size of what’s falling into Sagittarius. By the way, a cloud is just heading that way).
Such galactic drama has a potential impact on the presence of advanced life. The richer the galaxy gets in various feature the situation looks, the harder it looks to compute the probability of advanced life.
The profusion of habitable planets is all the more remarkable, as the primitive methods used so far require the planet to pass between us and its star.
(The research, started on the ground in Europe, expanded with dedicated satellites, the French Corot and NASA’s Kepler spacecraft.). Sun-like stars are “yellow dwarves”. They live ten billion years.
From that, confusing “habitable” and “inhabitated”, the New York Times deduced: “The known odds of something — or someone — living far, far away from Earth improved beyond astronomers’ boldest dreams on Monday. “
However, it’s not that simple.
Primitive bacterial life is probably frequent. However advanced life (animals) is probably very rare, as many are the potential catastrophes. And one needs billions of years to go from primitive life to animals.
After life forms making oxygen on Earth appeared, the atmosphere went from reducing (full of strong greenhouse methane) to oxidizing (full of oxygen). As methane mostly disappeared, so did the greenhouse. Earth froze, all the way down to the equator:
When Snowball Earth Nearly Killed Life.
Yet volcanoes kept on belching CO2 through the ice. That CO2 built up above the ice, caused a strong greenhouse, and the ice melted. Life had survived. Mighty volcanism has saved the Earth, just in time.
That “snowball Earth” catastrophe repeated a few times before the Earth oxygen based system became stable. Catastrophe had been engaged, several times, but the disappearance of oxygen creating life forms had been avoided, just barely.
Many are the other catastrophes we have become aware of, that could wipe out advanced life: proximal supernovas or gamma ray explosions.
Cataclysmic eruption of the central galactic black hole happen frequently. The lobes from the last one are still visible, perpendicularly high off the galactic plane. The radiation is still making the Magellanic Stream simmer, 200,000 light years away. Such explosions have got to have sterilized a good part of the galaxy.
In 2014 when part of the huge gas cloud known as G2 falls into Sagittarius A*, we will learn better how inhospitable the central galaxy is for advanced life.
Many of the star systems revealed out there have surprising feature: heavy planets (“super Jupiters“) grazing their own stars. It’s unlikely those giants were formed where they are. They probably swept their entire systems, destroying all the rocky planets in their giant way. We don’t understand these cataclysmic dynamics, but they seem frequent.
Solar energy received on Earth fluctuated and changed a lot, maybe from one (long ago) to four (now). But, as it turned out just so that Earthly life could survive. Also the inner nuclear reactor with its convective magma and tectonic plates was able to keep the carbon dioxide up in the air, just so.
The Goldilocks zones astronomers presently consider seem to be all too large to allow life to evolve over billions of years. They have to be much narrower and not just with red dwarves (the most frequent and long living stars).
One of our Goldilocks, Mars, started well, but lost its CO2 and became too cold. The other Goldilocks, Venus, suffered the opposite major technical malfunction: a runaway CO2 greenhouse.
Mars’ axis of rotation tilts on the solar system’s plane enormously: by 60 degrees, over millions of years. So Mars experiences considerable climatic variations over the eons, as it goes through slow super winters and super summers (it’s imaginable that, as the poles melt, Mars is much more habitable during super summers; thus life underground, hibernating is also imaginable there).
Earth’s Moon prevents this sort of crazy hyper seasons. While, differently from Venus, Earth rotates at reasonable clip, homogenizing the temperatures. Venus takes 243 days to rotate.
It is startling that, of the four inner and only rocky planets, just one, Earth has a rotation compatible with the long term evolution of advanced life.
Earth has also two striking characteristics: it has a very large moon that store much of the angular momentum of the Earth-Moon system. Without Moon, the Earth would rotate on itself once every 8 hours (after 5 billion years of braking by Solar tides).
The Moon used to hover at least ten times closer than now, when earth’s days were at most 6 hours long.
The tidal force is the difference between gravitational attraction in two closely separated places, so it’s the differential of said attraction (which is proportional to 1/dd; d being the distance). Hence the tidal force is inversely proportional to the cube of the distance.
Thus on early Earth tides a kilometer high were common, washing back and forth every three hours. a hyper super tsunami every three hours, going deep inside the continents. Not exactly conditions you expect all over the universe.
Hence biological material fabricated on the continental margins in shallow pools would get mixed with the oceans readily. That would guarantee accelerated launch of life (and indeed we know life started on Earth very fast).
The theory of formation of the Moon is wobbly (recent detailed computations of the simplest impact theory do not work). All we know for sure, thanks to the Moon rocks from Apollo, is that the Moon is made of Earth mantle materials.
Somehow the two planets split in two. (Fission. Get it? It maybe a hint.)
Another thing we know for sure is that Earth has, at its core, a giant nuclear fission reactor, keeping Earth’s core hotter than the surface of the sun. An unimaginable liquid ocean of liquid iron deep down inside below our feet undergoes iron weather. Hell itself, the old fashion way, pales in comparison.
Could the Moon and the giant nuclear reactor have the same origin? This is my provocative question of the day. The Moon, our life giver, could well have formed from giant nuclear explosions, of another of our life givers, what became the nuke at the core. I can already hear herds of ecologists yelp in the distance. I present the facts, you pseudo-ecologists don’t decide upon them. It’s clear that nuclear fission is not in Drake equation: if nothing else, it’s too politically incorrect.
All the preceding makes this clear:
Many are the inhabitable planets, yet few will be inhabitated by serious denizens.
This means that the cosmos is all for our taking. The only question is how to get there. The closest stars in the Proxima, Beta and Alpha Centauri system are not attainable, for a human crew, with existing technology.
However, if we mastered clean colossal energy production, of the order of the entire present energy production of humanity, we could get a colony there (only presently imaginable technology would be fusion).
Giordano Bruno, professor, astronomer, and priest suggested that there were many other inhabitated systems around the stars. That insult against Islam meant Christianity was punished the hard way: the Vatican, the famous terrorist organization of god crazies, put a device in Giordano’s mouth that pierced his palate, and having made sure that way that he could not tell the truth, the terrorists then burned him alive. After seven years of torture.
The horror of truth was unbearable to theo-plutocrats.
Now we face something even worse: everywhere out there is very primitive life. It is likely gracing 40 billion worlds. But, if one has to duplicate the succession of miracles and improbabilities that made Earth, to earn advanced life, it may be just here that civilization ever rose to contemplate them.
Congratulations to India for launching yesterday a mission to Mars ostensibly to find out if there is life there (by finding CH4; while life is presently unlikely, Mars has much to teach, including whether it started there). That’s the spirit!
The spirit is to have minds go where even imagination itself did not go before.
If we sit back, and look at the universe we have now, from Dark Matter, to Dark Energy, to Sagittarius, to the nuclear reactor below, to billions of Earths, to a strange Higgs, to Non Aristotelian logic, we see a wealth, an opulence of possibilities inconceivable twenty years ago.
Progress is not just about doing better what was done yesterday. It’s also about previously inconceivable blossoms of entirely new mental universes.
A team of scientists take to the skies in one of the world’s largest airships, for a unique exploration of Earth’s most precious and mysterious environment – the atmosphere.
In an example of what might be called a massive change of topic from yesterday’s post on Integrity and democracy, today’s offering to you, dear reader, is about the magnificent atmosphere upon which we all depend.
Here’s a clue.
Sunrise to our North-East at a little after 7am on Sunday, 13th July, 2014.
Every Breath We Take: Understanding Our Atmosphere
The air around us is not just empty space; it is an integral part of the chemistry of life. Plants are made from carbon dioxide, nitrogen nourishes the soil and oxygen gives us the energy we need to keep our hearts pumping and our brains alive. But how did we come to understand what air is made of? How did we come to know that this invisible stuff around us contains anything at all?
Gabrielle Walker tells the remarkable story of the quest to understand the air. It’s a tale of heroes and underdogs, chance encounters and sheer blind luck that spans the entire history of science. It began as a simple desire to further our knowledge of the natural world, but it ended up uncovering raw materials that have shaped our modern world, unravelling the secrets of our own physiology and revealing why we are here at all.
There is much more to explore on the website, including this trailer to the programme.
Oh, here’s another ‘clue’ from Oregon.
Same morning, same sunrise.
The presenter of the BBC series is Felicity Aston who writes on her BBC Blog:
I joined Operation Cloud Lab: Secrets Of The Skies as the expedition leader and also as a meteorologist.
The plan was to fly from Florida to California, looking at the science of the skies.
But as well as scientists, there were plenty of other people on the team including three pilots, a ground crew of 14 that followed the airship by road and a full production team including two camera crews. Not everyone could be on board at once – the airship would never have got off the ground!
But I was really fortunate to spend a lot of time on board and flew most of the way across the continent.
Exploring in three dimensions rather than being limited to making observations from the ground was a revelation to me.
The clouds in the tropics around the Gulf of Mexico are huge, and being in the sky with them really brought home the vast scale of the forces at work.
Towering cumulus cloud in Florida.
We were able to travel over, under and through these monsters, revealing that clouds are about as far from the popular image of light and fluffy floating puffs of cotton wool as you can get! They are dense and heavy and full of destructive energy.
I remember looking down at the cloud layer from a plane as a child, and daydreaming about exploring this new world of unknown places, so I was very excited the first time we flew straight through a cloud.
I leaned out of the airship as far as I dared into the heart of a cloud and found that it was a dark, damp mass of floating fog (of course!) – no mysterious worlds – my childhood fantasies were crushed!
There’s more to read on her blog as well as some stupendous photographs of clouds.
So if this gives you a thrill then don’t delay in watching the full-length Episode One on YouTube before it gets taken down. (Warning: if you watch the opening first few minutes you will be hooked for the full hour!)
A pleasure to highlight the creative work of Ira Wiesenfeld DVM
Earlier on this week, we were fortunate in having a long-term friend of Jean and her late husband, Ben, stay with us. In distant times, Ira, him being the friend, had been a horse veterinarian but many years ago had changed course. As he explains on his web-site:
I grew up the scientist in an artistic family. I didn’t discover my right brain until midlife; my left was burned out and a crisis was upon me. First came the craft of blacksmithing, which I found therapeutic and immensely satisfying. Then a style of work developed that was biomorphic, botanical and branching. Finally a passion for sculpture evolved, made from forged, found, and fabricated metal.
Ten years ago I decided to get serious; I gave up my day job and began working full time in my smithy. Now I like to say that I forge and weld furniture, sculpture and anything in- between. I especially enjoy working in that in-between space, where aesthetics, function and narrative meet.
Ira was en-route to an exhibition in Portland which gave us the opportunity both to have him stay and for us to browse over some of the pieces he had with him.
Ira
oooo
My impromptu picture-taking didn’t do justice to this piece. A much better version is the one below taken directly from Ira’s website Circle of Iron Forge.
Iron and Copper Nestbowl.
oooo
Ira discussing with Jean what could be done with an old iron pulley-wheel we found here at home.
oooo
Just missing the water and fish!
Have to say that I was very impressed by both Ira’s creative artistry and his metal-working skills.
Let me leave you with one more example of Ira’s work, taken from his web-site and his contact details in case any of you dear readers are motivated to be in direct touch with Ira.
Empty Nest Forged and welded steel, copper, bronze, and stainless steel.
Ira Wiesenfeld DVM
Tucson, Arizona
Treeira@hotmail.com
520-742-5274
First of all a Very Happy Summer Solstice wherever you are (in the Northern Hemisphere!)
Neighbour Larry sent me a link to a delightful story about solving the problem of a yacht, with a mainmast stretching 85 feet above the water level, passing under a bridge that had a clearance of 65 feet above that same water level.
Here’s a picture to whet your interest. (Notice I wrote ‘whet’ not ‘wet’!)
A case of lateral thinking!
The story was reported in UK’s The Daily Mail newspaper nearly three years ago. So I shall take a chance and republish it for you.
Beats going the long way round! How sailors got their 80ft mast under 65ft bridge
It may not look like an entirely safe practice – but it sure beats going the long way round.
These sailors came up with an ingenious way to get their boat – complete with 80ft mast – under a 65ft bridge on the Intracoastal Waterway. A video posted on YouTube shows how the sailors keeled the boat over by dangling containers filled with two tons of water from the mast.
But it is not a solution for the faint hearted.
Any miscalculation with the weight has the potential to send the whole boat crashing into the water.
The sailor ‘hunterparrot’ who posted the video said he initiates the roll by fixing the containers to the mast and slowly turning to port. The severity of the roll is then controlled by letting the ropes affixed to the mast out gradually with a cockpit winch.
The intracoastal waterway is a 3000-mile network of waterways that run up the Gulf and Atlantic coasts of the U.S. It runs from New Jersey, around Florida to Texas.
Follow us: @MailOnline on Twitter | DailyMail on Facebook
The photographs in that Daily Mail article may be viewed here.
Really? If the bridge clearance is 65 feet and the mast height is 80 feet, then the cosine of the heel angle would be 65 / 80. This corresponds to a heel angle of about 36 degrees; the mast is 54 degrees above the horizontal. Still, a pretty impressive maneuver.
If the bags are full of water, then his setup is self-limiting. As the bags start to immerse, the pull on the halyard is reduced. This means he would be nearly unable to capsize unless he winches the bags WAY too high. I think he has done this trick before.
I think the reason he is sitting on the high side is twofold: He can see the masthead more easily and it is more comfortable
The weight of one person really doesn’t make much difference when you are trying to heel that big a boat that far.
If someone had to do this sort of trick a lot, would it be worth putting a small video camera on the top of the mainmast? This would make it easier to judge clearance.
How food and carbon-based energy are irresistibly woven together.
Jean and I watched this BBC Nature programme the other evening. Not directly from the BBC but because it has been uploaded to YouTube and thence was promoted on Top Documentary Films.
The film is 48-minutes long and, frankly, there’s not much point in reading the rest of the post until you have viewed the film!
Wildlife film maker Rebecca Hosking investigates how to transform her family’s farm in Devon into a low energy farm for the future, and discovers that nature holds the key.
With her father close to retirement, Rebecca returns to her family’s wildlife-friendly farm in Devon, to become the next generation to farm the land. But last year’s high fuel prices were a wake-up call for Rebecca. Realising that all food production in the UK is completely dependent on abundant cheap fossil fuel, particularly oil, she sets out to discover just how secure this oil supply is.
Alarmed by the answers, she explores ways of farming without using fossil fuel. With the help of pioneering farmers and growers, Rebecca learns that it is actually nature that holds the key to farming in a low-energy future.
Nature holds the key!
So, rather than tempt you to read on and not watch the film, that’s all you are getting for today! 😉
Settle yourself down somewhere comfortable and watch the film.
Today is Memorial Day for all Americans that have died while serving their country.
Just a short preamble.
I was born in London six months to the day before the day on which the second world war ended. On that day in early May, 1945 my mother breathed a sigh of relief and knew I was going to live! The fact that I am writing this post does rather confirm that! 😉
Not only is this the year of my seventieth birthday (but, PLEASE, don’t remind me!) but my mother is also still alive and well and is coming to see Jean and me in our Oregon home in ten weeks time.
I served as a Radio Operator in the Royal Naval Reserve between 1963 and 1968. That is the totality of my military experiences. Ergo, I have been more than fortunate not to have experienced military conflict at any time in my life.
So today’s post is just something gentle to remind us all of the advantages of freedom for humans and animals alike.
Sometimes less says more: a growl or a snarl can be worth a thousand words. Without any verbal dialogue, the raw emotions of the wilderness are vivid in this segment of The Bear, a film about the actions of animals in relation to humans. In this suspenseful part of the story, a cub is hunted by a mountain lion who shows no mercy. Without any verbal dialogue, the raw emotions of the wilderness shine through.
Film Reviews:
Storytelling doesn’t get much purer than this–a film with virtually no dialogue and not a minute that isn’t fascinating, either for the plot it pursues or the way director Jean-Jacques Annaud gets his ursine stars to do what he wants. The story deals with a young cub who, after his mother is killed in a landslide, bonds to a lumbering male Kodiak. The two of them then must cope with an invasion of hunters into their territory – and Annaud makes it clear whose side he’s on. Aside from stunning scenery, the film offers startlingly close-up looks at bear behavior. They say the best actors are the ones that let you see what they’re thinking, a trick Annaud manages with his big, furry stars. – Marshall Fine
The Bear has all the marks of a classic. Lauded by animal rights groups for its respect for the integrity of all species, it manages to speak out eloquently against the senseless hunting of wildlife without having to depict killing to make its point. Instead, it emphasizes the ties that bind the human and animal worlds together. – Frederic and Mary Ann Brussat
May your day wherever you are in the world be a peaceful one.
Taking a bit of an emotional rest after the last two days!
Wanted to share with you something that Dan Gomez sent me. It was an email with a link to an item in the British newspaper, The Independent. It was an article headlined: Incredible Nasa footage shows a ‘hole in the Sun’ that’s bigger than Jupiter. The article opened:
Nasa has released new footage showing a square ‘hole’ in the Sun captured by the space agency’s Solar Dynamics Observatory (SDO) spacecraft.
The phenomenon – known as a coronal hole – is perfectly normal and shows an area of the Sun’s corona that contains plasma with lower than average density. Nasa says that the coronal hole appears dark in the ultraviolet filter “as there is less material to emit in these wavelengths.”
It was then a simple matter to go to that NASA report and enjoy this stunning image.
Coronal Hole Squared
Coronal Hole Squared
A coronal hole, almost square in its shape, is one of the most noticeable features on the Sun of late (May 5-7, 2014). A coronal hole is an area where high-speed solar wind streams into space. It appears dark in extreme ultraviolet light as there is less material to emit in these wavelengths. Inside the coronal hole you can see bright loops where the hot plasma outlines little pieces of the solar magnetic field sticking above the surface. Because it is positioned so far south on the Sun, there is less chance that the solar wind stream will impact us here on Earth. Credit: Solar Dynamics Observatory/NASA
Learning from Dogs 