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How can Jupiter have no surface? A dive into a planet so big, it could swallow 1,000 Earths

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theconversation.com – Benjamin Roulston, Assistant Professor of Physics, Clarkson – 2024-11-04 07:48:00

A photo of Jupiter taken by NASA’s Juno spacecraft in September 2023.
NASA/JPL-Caltech/SwRI/MSSS, image processing by Tanya Oleksuik

Benjamin Roulston, Clarkson University

Curious Kids is a for of all ages. If you have a question you’d like an expert to answer, send it to curiouskidsus@theconversation.com.


Why does Jupiter look like it has a surface โ€“ even though it doesn’t have one? โ€“ Sejal, age 7, Bangalore, India


The planet Jupiter has no solid ground โ€“ no surface, like the grass or dirt you tread here on Earth. There’s nothing to walk on, and no place to a spaceship.

But how can that be? If Jupiter doesn’t have a surface, what does it have? How can it hold together?

Even as a professor of physics who studies all kinds of unusual phenomena, I realize the concept of a world without a surface is difficult to fathom. Yet much about Jupiter remains a mystery, even as NASA’s robotic probe Juno begins its ninth year orbiting this strange planet.

Jupiter’s mass is two-and-a-half times that of all the other planets in the solar system combined.

First, some facts

Jupiter, the fifth planet from the Sun, is between Mars and Saturn. It’s the largest planet in the solar system, big enough for more than 1,000 Earths to fit inside, with room to spare.

While the four inner planets of the solar system โ€“ Mercury, Venus, Earth and Mars โ€“ are all made of solid, rocky material, Jupiter is a gas giant with a composition similar to the Sun; it’s a roiling, stormy, wildly turbulent ball of gas. Some places on Jupiter have winds of more than 400 mph (about 640 kilometers per hour), about three times faster than a Category 5 hurricane on Earth.

A photograph of the planet Jupiter swathed in blue, brown and gold bands.
A photo of the southern hemisphere of Jupiter, taken by NASA’s Juno spacecraft in 2017.
NASA/JPL-Caltech/SwRI/MSSS/Gerald Eichstadt/Sean Doran

Searching for solid ground

Start from the top of Earth’s atmosphere, go down about 60 miles (roughly 100 kilometers), and the air pressure continuously increases. Ultimately you hit Earth’s surface, either land or water.

Compare that with Jupiter: Start near the top of its mostly hydrogen and helium atmosphere, and like on Earth, the pressure increases the deeper you go. But on Jupiter, the pressure is immense.

As the layers of gas above you push down more and more, it’s like being at the bottom of the ocean โ€“ but instead of water, you’re surrounded by gas. The pressure becomes so intense that the human body would implode; you would be squashed.

Go down 1,000 miles (1,600 kilometers), and the hot, dense gas begins to behave strangely. Eventually, the gas turns into a form of liquid hydrogen, creating what can be thought of as the largest ocean in the solar system, albeit an ocean without water.

Go down another 20,000 miles (about 32,000 kilometers), and the hydrogen becomes more like flowing liquid metal, a material so exotic that only recently, and with great difficulty, have scientists reproduced it in the laboratory. The atoms in this liquid metallic hydrogen are squeezed so tightly that its electrons are free to roam.

Keep in mind that these layer transitions are gradual, not abrupt; the transition from normal hydrogen gas to liquid hydrogen and then to metallic hydrogen happens slowly and smoothly. At no point is there a sharp boundary, solid material or surface.

An illustration that shows the interior layers of Jupiter, including its core.
An illustration of Jupiter’s interior layers. One bar is approximately equal to the pressure at sea level on Earth.
NASA/JPL-Caltech

Scary to the core

Ultimately, you’d reach the core of Jupiter. This is the central region of Jupiter’s interior, and not to be confused with a surface.

Scientists are still debating the exact nature of the core’s material. The most favored model: It’s not solid, like rock, but more like a hot, dense and possibly metallic mixture of liquid and solid.

The pressure at Jupiter’s core is so immense that it would be like 100 million Earth atmospheres pressing down on you โ€“ or two Empire buildings on top of each square inch of your body.

But pressure wouldn’t be your only problem. A spacecraft trying to reach Jupiter’s core would be melted by the extreme heat โ€“ 35,000 degrees Fahrenheit (20,000 degrees Celsius). That’s three times hotter than the surface of the Sun.

An image of Jupiter featuring brown, beige and orange belts along with the Great Red Spot.
An image taken of Jupiter by Voyager 1. Note the Great Red Spot, a storm large enough to hold three Earths.
NASA/JPL

Jupiter helps Earth

Jupiter is a weird and forbidding place. But if Jupiter weren’t around, it’s possible human beings might not exist.

That’s because Jupiter acts as a shield for the inner planets of the solar system, Earth. With its massive gravitational pull, Jupiter has altered the orbit of asteroids and comets for billions of years.

Without Jupiter’s intervention, some of that debris could have crashed into Earth; if one had been a cataclysmic collision, it could have caused an extinction-level . Just look at what happened to the dinosaurs.

Maybe Jupiter gave an assist to our existence, but the planet itself is extraordinarily inhospitable to life โ€“ at least, life as we know it.

The same is not the case with a Jupiter moon, Europa, perhaps our best chance to find life elsewhere in the solar system.

NASA’s Europa Clipper, a robotic probe launching in October 2024, is scheduled to do about 50 fly-bys over that moon to study its enormous underground ocean.

Could something be living in Europa’s water? Scientists won’t know for a while. Because of Jupiter’s distance from Earth, the probe won’t arrive until April 2030.


Hello, curious kids! Do you have a question you’d like an expert to answer? Ask an adult to send your question to CuriousKidsUS@theconversation.com. Please tell us your name, age and the city where you .

And since curiosity has no age limit โ€“ adults, let us know what you’re wondering, too. We won’t be able to answer every question, but we will do our best.The Conversation

Benjamin Roulston, Assistant Professor of Physics, Clarkson University

This article is republished from The Conversation under a Creative Commons license. Read the original article.

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The 27 Club isnโ€™t true, but it is real โˆ’ a sociologist explains why myths endure and how they shape reality

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theconversation.com – Zackary Okun Dunivin, Postdoctoral Fellow in Communication, of California, Davis – 2024-11-04 14:02:00

Many members of the 27 Club are outsize in their cultural influence.
Psychology Forever/Wikimedia Commons, CC BY-SA

Zackary Okun Dunivin, University of California, Davis

There’s a certain allure to the notion that some of the world’s brightest burn out at the age of 27. The so-called 27 Club has captivated the public imagination for half a century. Its members include legendary musicians Jimi Hendrix, Janis Joplin, Jim Morrison, Kurt Cobain and Amy Winehouse. The idea is as seductive as it is tragic: a convergence of talent, fame and untimely at a singular age.

But is there any truth to this phenomenon, or is it merely a story we tell ourselves and each other about fame and youth?

In our newly published research, my colleague Patrick Kaminski and I explore why the 27 Club persists in culture. We didn’t set out to debunk the myth. After all, there is no reason to think that 27 is an especially dangerous age beyond superstition.

Rather, we wanted to explore the 27 Club to understand how such a myth gains traction and affects people’s perception of reality.

Is the 27 Club real?

The origin of the 27 Club dates back to the early 1970s, the deaths of Brian Jones, Jimi Hendrix, Janis Joplin and Jim Morrison โ€“ all at age 27, within a span of two years.

This uncanny coincidence left its mark on collective memory. It wasn’t just their age. It was the common thread of musical genius, countercultural influence and the tragic allure of lives cut short by a cocktail of fame, drug use and the struggle of being human. The narrative is not just compelling but almost mystical in its synchronicity.

Analyzing data from 344,156 notable deceased individuals listed on Wikipedia, we found that while there’s no increased risk of dying at 27, those who do die at that age receive significantly more public attention. Using Wikipedia page views as a proxy for fame, our study revealed that the legacies of these 27-year-olds are amplified, garnering more visibility than those who die at adjacent ages.

This increased visibility has a strange effect: People are more likely to encounter those who died at 27 than other young ages, even if they are not aware of the myth. This in turn creates the appearance of greater risk of mortality at 27. The myth of the 27 Club is a self-fulfilling prophecy: It became โ€œrealโ€ because we believed it.

Why is the 27 Club a thing?

We believe this phenomenon can be understood through three interrelated concepts: path dependence, stigmergy and memetic reification.

Path dependence refers to how random can set a precedent that influences future outcomes. The initial cluster of high-profile deaths at age 27 was statistically improbable โ€“ we estimate that one in 100,000 timelines would have four such famous deaths at age 27 โ€“ but it established a narrative pathway that has persisted and shaped collective reality.

Stigmergy how traces of an or action left in the can indirectly coordinate future events or actions. In the digital age, platforms such as Wikipedia serve as repositories of collective memory. The existence of a dedicated 27 Club page, with links to its members’ pages, increases the visibility of those who die at 27. This creates a feedback loop: The more we click, the more prominent these figures become, and the more the myth is reinforced.

Finally, what we call memetic reification captures how beliefs can shape reality. We draw from a sociological concept called the Thomas theorem, which states that if you โ€œdefine a situation as real, they are real in their consequences.โ€ The 27 Club myth has tangible effects on cultural memory and fame. By imbuing significance into the age of 27, society elevates the legacies of those who die at that age, making the myth materially consequential.

Why do myths endure?

Why do such myths endure? At their core, myths are not about factual accuracy but about narratives that resonate with people. They thrive on mystery, tragedy and the human penchant for finding patterns even in randomness. The story of the 27 Club is poetic, encapsulating the fleeting nature of genius and the fragility of life. It’s a story that begs to be told and retold, regardless of its veracity.

This isn’t an isolated phenomenon. Cultural patterns often arise from events that, through collective commitment and storytelling, become embedded in our understanding of the world.

Your social world shapes what you value and how you behave.

Consider the evolution of language โ€“ why do we call a dog a โ€œdogโ€? There is nothing doggy about the word. Philosopher Ludwig Wittgenstein observed that nearly all symbols are arbitrary. Some countries drive on the left side of the road while others on the right. While the choice to adopt left- or right-side traffic is influenced by neighboring countries or car producers, ultimately these followed from an arbitrary resolution to the need to pick one side or the other. These conventions began as random occurrences that, over time, became standardized and meaningful through social reinforcement.

The 27 Club serves as a lens through which you can examine the power of mythmaking in shaping perceptions of history and reality. It highlights how collective beliefs can have real-world consequences, influencing who becomes immortalized in cultural memory. It’s a testament to the complex interplay between chance events, storytelling and the mechanisms by which myths are perpetuated.

Though we may appear to dispel the myth of the 27 Club, let’s not abandon the story. We’re myth trusters, not myth busters. In unraveling the myth, we’re acknowledging the profound ways in which narratives influence our collective consciousness. By understanding the processes behind myth formation, we can better appreciate the richness of culture and the stories people choose to tell.The Conversation

Zackary Okun Dunivin, Postdoctoral Fellow in Communication, University of California, Davis

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Iโ€™m a Muslim immigrant and a psychiatrist living in Michigan โ€“ I havenโ€™t decided how to vote yet

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theconversation.com – Farha Abassi, Assistant Professor of Psychiatry, Michigan – 2024-11-04 07:49:00

Farha Abassi, Michigan State University

My three daughters and I arrived in Michigan from Pakistan in 2000.

Moving here was my choice, and I followed the legal . Before the move, I had often been to the United States. I was familiar with the culture and spoke fluent English, so I thought I was prepared.

Resuming my career as a physician in the U.S. was arduous, but I finally passed all the qualifying exams and completed a psychiatry residency at Michigan State University in 2006. After finishing my studies, I stayed on as faculty.

Of course, there is nothing new or particularly unique about my ‘s experience. Immigration, whether it is out of choice or forced by conflict, has always been part of the American experience. After all, the U.S. Constitution was signed by seven first-generation immigrants.

Experts will tell you that immigration makes our country stronger economically, culturally and in fields like science and medicine. Since I’m a doctor, I’m well aware that 26% of licensed U.S. physicians and surgeons are immigrants.

But it is also true that immigrants like me face stresses that harm our
psychical and mental health.

I teach cultural psychiatry to medical students and residents, specifically how to culturally appropriate care to Muslim . After more than 20 years in Michigan, I’m deeply rooted in the Muslim and immigrant community, and I’ve seen firsthand how anxious and uncertain my community is about the 2024 presidential election.

Panic attacks and depression

Republican presidential candidate Donald Trump has called immigrants โ€œbloodthirsty criminalsโ€ and the โ€œmost violent people on Earth.โ€ He claims that immigrants were โ€œpoisoning the blood of our country.โ€ Research shows, and I’ve seen personally, how this kind of talk can cause anxiety and depression in immigrants both undocumented and legal.

Undocumented immigrants and their families, who in precarious conditions and in fear of being deported, are especially vulnerable to Trump’s calls for mass deportations.

History has taught us that a politician’s hateful words can lead to violence.

In the first half of 2024, the Michigan Chapter of the Council on American-Islamic Relations documented 239 complaints of discrimination against Muslims, an 81% increase over the same period in 2023. In the , CAIR-MI Executive Director Dawud Walid attributed the uptick to โ€œpolicies of elected officials, rhetoric of candidates running for office, along with victim blaming by some political pundits.โ€

Adding to the situation are the deepening crises in the Gaza Strip and Lebanon, which are making Muslims in Michigan, especially those with relatives in the Middle East, reel with palpable grief.

This rise in Islamophobia and fear of an uncertain future is taking a toll. American Muslims are twice as likely to attempt suicide compared with people from other faiths.

Anxiety in the voting booth

Like 73% of all Americans, immigrants are anxious about the election.

With the politicization of baseless claims of undocumented immigrants voting, the fact is that naturalized citizens โ€“ who have every right to take part in the election โ€“ are a formidable voting bloc, making up 1 in 10 of the nation’s eligible voters and about 5% in Michigan.

What’s more, naturalized citizens tend to vote at higher rates than native-born citizens.

Still, for many Muslims in Michigan, it is hard to know how to vote this year. I don’t trust either of the major parties.

Michigan’s Muslims are feeling devalued and disenfranchised.

A key Arab American political action committee based in Michigan refused to endorse either candidate this cycle. Although the PAC typically backs Democrats, this year it said โ€œneither candidate represents our hopes and dreams as Arab Americans.โ€

In late September, a national group of three dozen Muslim American scholars and imams signed an open letter calling on Muslims not to vote for Democratic nominee Kamala Harris.

โ€œWe want to be absolutely clear,โ€ the letter reads, โ€œdon’t stay home and skip voting. This year, make a statement by voting third party for the presidential ticket.โ€

A group called Listen to Michigan gained attention during the primaries by attracting more than 100,000 people to vote โ€œuncommittedโ€ as a protest against ‘s funding of the war in Gaza. The group has stopped short of endorsing Harris but urged voters โ€œnot to cast their ballot for anyone but her.โ€

Still, some of my neighbors have decided to back Green Party candidate Jill Stein.

I know my vote is my voice, and I fully intend to participate in the electoral process. But I can’t trust any of the candidates to create a safe haven for my family โ€“ a place where my daughters and I can thrive and live our American dream.The Conversation

Farha Abassi, Assistant Professor of Psychiatry, Michigan State University

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Osteoporosis, the silent disease, can shorten your life โˆ’ hereโ€™s how to prevent fractures and keep bones healthy

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theconversation.com – Ting Zhang, Research Scholar of Orthopedics, of Pittsburgh – 2024-11-04 07:47:00

With some simple lifestyle changes, you can lower your risk of osteoporosis.
MoMo Productions/DigitalVision via Getty Images

Ting Zhang, University of Pittsburgh and Jianying Zhang, University of Pittsburgh

Because there are typically no symptoms until the first fracture occurs, osteoporosis is considered a silent disease. Some call it a silent killer.

Osteoporosis is a bone disease characterized by decreased bone density and strength, leading to fragile, brittle bones that increase the risk of fractures, especially in the spine, hips and wrists.

The National Osteoporosis Foundation estimates that more than 10 million Americans have osteoporosis. Another 43 million have low bone mass, which is the precursor to osteoporosis. By 2030, the number of adults with osteoporosis or low bone mass is estimated to increase by more than 30%, to 71 million.

The reasons for the increase include lifestyle issues, particularly smoking, lack of physical activity and alcohol abuse. Our aging population, along with the insufficient attention paid to this disease, are also why osteoporosis is on the rise.

An illustration of osteoporosis of the spine, which features sponge-like, brownish tissue.
An illustration of osteoporosis of the spine. Note the sponge-like tissue, which is partially destroyed.
BSIP/Universal Images Group via Getty Images

If you are older, it may be discouraging to read those statistics. But as orthopedic specialists who have studied this disease, we know that osteoporosis is not inevitable. The key to having healthy bones for a lifetime is to take some simple preventive measures โ€“ and the earlier, the better.

Although the symptoms are not obvious early on, certain signs will indicate your bones are becoming weaker. The most serious complications of osteoporosis are fractures, which can to chronic pain, hospitalization, disability, depression, reduced quality of and increased mortality. Worldwide, osteoporosis causes nearly 9 million fractures annually. That’s one osteoporotic fracture every three seconds.

Height loss, back pain

Minor bumps or falls may lead to fractures, especially in the hip, wrist or spine. These types of fractures are often the first sign of the disease.

If you notice that you’re getting shorter, the cause could be compression fractures in the spine; this too is a common symptom of osteoporosis.

Although it’s typical for most people to lose height as they age โ€“ about 1 to 1ยฝ inches (2.5 to 3.8 centimeters) over a lifetime โ€“ those with osteoporosis who have multiple spinal fractures could lose 2 to 3 inches or more in a relatively rapid time frame.

Curved posture, or noticeable changes in posture, may lead to a hunched back, which could be a sign that your spine is weakening and losing density.

Persistent back pain is another indicator โ€“ this too is the result of tiny fractures or compression of the spine.

A healthy diet and exercise are two ways to build up bone density.

Calcium and vitamin D

Osteoporosis cannot be completely cured, but certain lifestyle and dietary factors can lower your risk.

Calcium and vitamin D are essential for bone health. Calcium helps maintain strong bones, while vitamin D assists in calcium absorption. Women over age 50 and over 70 should consume at least 1,200 milligrams of calcium daily from food and, if necessary, supplements.

The easy way to get calcium is through dairy products. Milk, yogurt and cheese are among the richest sources. One cup of milk provides about 300 milligrams of calcium, one-fourth of the requirement. If you are vegan, calcium is in many plant-based foods, soy, beans, peas, lentils, oranges, almonds and dark leafy greens.

Adults should aim for two to three servings of calcium-rich foods daily. Consuming them throughout the day with meals helps improve absorption.

Vitamin D is obtained mostly from supplements and sunlight, which is the easiest way to get the recommended dose. Your body will produce enough vitamin D if you expose your arms, legs and face to direct sunlight for 10 to 30 minutes between 10 a.m. and 3 p.m., two to three times a .

Although it’s best to wear short-sleeve shirts and shorts during this brief period, it’s okay to wear sunglasses and apply sunscreen to your face. Sunlight through a window won’t have the same effect โ€“ glass reduces absorption of the UV rays needed for vitamin D production. People with darker skin, or those living in less sunny regions, may need more sunlight to get the same effect.

If a doctor has given you a diagnosis of osteoporosis, it’s possible the calcium and vitamin D that you’re getting through food and sun exposure alone is not enough; you should ask your doctor if you need medication.

Chickpeas, sesame seeds and dark green vegetables, such as kale, arugula and broccoli, are good sources of calcium.

Dance, jog, lift weights and avoid alcohol

Regular exercise is an excellent activity that can help stave off osteoporosis. Weight-bearing exercises, such as brisk walking, jogging and dancing, are great for increasing bone density. Strength , such as lifting weights, helps with stability and flexibility, which reduces the risk of falling.

Aim for 30 minutes of weight-bearing exercise at least four days a week, combined with muscle-strengthening exercises at least twice a week.

Particularly for women, who lose bone density during and after menopause, regular exercise is critical. Working out prior to menopause will reduce the risk of osteoporosis in your later years.

And avoid harmful habits โ€“ smoking and heavy alcohol consumption can weaken bone density and increase the risk of fractures.

Fall prevention strategies and balance training are crucial and can help reduce the risk of fractures.

Screening and treatment

Women should start osteoporosis screening at age 65, according to the U.S. Preventive Services Task Force. Men should consider screening if they have risk factors for osteoporosis, which include smoking, alcohol use disorder, some chronic diseases such as diabetes, and age. Men over 70 are at higher risk.

Medical imaging such as a bone density scan and spinal X-rays can confirm osteoporosis and detect compression fractures. These basic tests, combined with age and medical history, are enough to make a clear diagnosis.

Managing osteoporosis is a long-term process that requires ongoing commitment to lifestyle changes. Recognizing the early warning signs and making these proactive lifestyle changes is the first step to prevent the disease and keep your bones healthy.The Conversation

Ting Zhang, Research Scholar of Orthopedics, University of Pittsburgh and Jianying Zhang, Research Professor of Orthopaedic Surgery, University of Pittsburgh

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