44 Closest Stars and How They Compare to our Sun
Humans have been fascinated by the stars in the night sky since the dawn of time.
We’ve been decoding the mysteries of celestial bodies for many centuries, but it is only in the last 200 years or so that we’ve been able to glean more detailed information on the lights that dot the night sky. Friedrich Bessel’s method of stellar parallax was a breakthrough in accurately measuring the positions of stars, and opened new doors in the effort to map our universe. Today, high-powered telescopes offer even more granular data on our cosmic neighborhood.
The infographic above, from Alan’s Factory Outlet, categorizes the 44 closest stars to Earth, examining the size, luminosity, constellations, systems, and potential planets of each star.
Our Nearest Stellar Neighbors
Our closest neighboring stars are all part of the same solar system: Alpha Centauri. This triple star system – consisting of Proxima Centauri, Alpha Centauri A, and Alpha Centauri B – attracts a lot of interest because it hosts planets, including one that may be similar to Earth.
The planet, Proxima Centauri b, is a lot closer to its star than Earth is to the Sun. However, because Proxima Centauri is a smaller and cooler red dwarf type star, the planet’s orbit is within the habitable zone. It’s thought that Proxima Centauri b receives approximately the same amount of solar energy as Earth does from our Sun.
Here’s a full list of the 44 of the closest stars to Earth:
|Star Name||Distance (light years)||MoE|
|α Centauri A||4.37||±0.0068|
|α Centauri B||4.37||±0.0068|
|Luyten 726-8 A||8.79||±0.012|
|Luyten 726-8 B||8.79||±0.012|
|EZ Aquarii A||11.11||±0.034|
|61 Cygni A||11.40||±0.0012|
|61 Cygni B||11.40||±0.0012|
|Struve 2398 A||11.49||±0.0012|
|Struve 2398 B||11.49||±0.0012|
|Groombridge 34 A||11.62||±0.0008|
|Groombridge 34 B||11.62||±0.0008|
|Kruger 60 A||13.07||±0.0052|
|Kruger 60 B||13.07||±0.0052|
|Wolf 424 A||14.05||±0.26|
|Van Maanen's star||14.07||±0.0023|
Even though we see many of these stars in the night sky, humans aren’t likely to see them in person any time soon. To put these vast distances into perspective, if the Voyager spacecraft were to travel to Proxima Centauri, it would take over 73,000 years to finally arrive.
The Brightest Stars in the Sky
The closest stars aren’t necessarily the ones most visible to us here on Earth. Here are the top 10 stars in terms of visual brightness from Earth:
|Rank||Proper name||Constellation||Visual magnitude (mV)||Distance (light years)|
|4||Rigil Kentaurus & Toliman||Centaurus||−0.27 (0.01 + 1.33)||4.4|
Excluding our Sun, the brightest star visible from Earth is Sirius, or the Dog Star. Sirius, which is about 25 times more luminous than the sun, visually punctuates the constellation Canis Major.
Filling in the Gaps
The next step in learning more about our surroundings in the cosmos will be seeing which of the stars listed above have planets orbiting them. So far, the 44 stars in the infographic have over 40 planets scattered among them, though new discoveries are made all the time.
With each new mission and discovery, we learn a little bit more about our pocket of the universe.
Cocoa: A Bittersweet Supply Chain
The cocoa supply chain is a bittersweet one. While chocolate is a beloved sweet treat globally, many cocoa farmers are living a bitter reality.
Cocoa: A Bittersweet Supply Chain
From bean to bar, the cocoa supply chain is a bittersweet one. While the end product is something most of us enjoy, this also comes with a human cost.
Based on how much cocoa comes from West Africa, it’s likely that most of the chocolates we eat have a little bit of Cote d’Ivoire and Ghana in them. The $130B chocolate industry relies on cocoa farming for supply of chocolate’s key ingredient. Yet, many cocoa farmers make less than $1/day.
The above graphic maps the major trade flows of cocoa and allows us to dive deeper into its global supply chain.
From Bean to Bar: Stages in the Cocoa Supply Chain
Cocoa beans go through a number of stages before being used in chocolate products.
- Harvesting, Fermenting, and Drying
First, farmers harvest cocoa beans from pods on cacao plants. Next, they are fermented in heaps and covered with banana leaves. Farmers then dry and package the cocoa beans for domestic transportation.
- Domestic Transportation, Cleaning, and Exporting
Domestic transporters carry packaged cocoa beans to either cleaning warehouses or processing factories. Cocoa beans are cleaned and prepared for exports to the chocolate production hubs of the world.
- Processing and Chocolate Production
Processing companies winnow, roast, and grind cocoa beans and then convert them into cocoa liquor, cocoa butter, or cocoa cakes—which are mixed with other ingredients like sugar and milk to produce chocolate products.
Cocoa farming and trade are at the roots of the chocolate industry, and the consistent supply of cocoa plays a critical role in providing us with reasonably-priced chocolate.
So where exactly does all this cocoa come from?
The Key Nations in Cocoa’s Global Supply Chain
Growing cocoa has specific temperature, water, and humidity requirements. As a result, the equatorial regions of Africa, Central and South America, and Asia are optimal for cocoa farming.
These regions host the biggest cocoa exporters by value.
|Rank (2019)||Exporting Country||Value (US$, millions)|
|1||Côte d’Ivoire 🇨🇮||$3,575|
Côte d’Ivoire and Ghana are responsible for 70% of global cocoa production, and cocoa exports play a huge role in their economies. Although the majority of exporters come from equatorial regions, Belgium stands out in fifth place.
On the other hand, most of the top importers are in Europe—the Netherlands and Germany being the top two.
|Rank (2019)||Importing Country||Value (US$, millions)|
In third place, the U.S. primarily sources its cocoa from Côte d’Ivoire, Ghana, and Ecuador. Mars, Hershey, Cargill, and Blommer—some of the world’s biggest chocolate manufacturers and processors—are headquartered in the U.S.
Finally, it comes as no surprise that the biggest importers of cocoa beans are among the biggest chocolate exporters.
|Rank (2019)||Country||Value of Chocolate Exports
Not only is the Netherlands the biggest importer of beans, but it’s also the biggest processor—grinding 600,000 tons annually—and the fourth largest exporter of chocolate products.
Belgium is another key nation in the supply chain, importing cocoa beans from producing countries and exporting them across Europe. It’s also home to the world’s largest chocolate factory, supporting its annual chocolate exports worth $3.1 billion.
Breaking Down the Cocoa Supply Chain: Who Gets What
Without farmers, both the cocoa and chocolate industries are likely to suffer from shortages, with domino effects on higher overall costs. Yet, they have little ability to influence prices at present.
Farmers are among the lowest earners from a tonne of sold cocoa—accounting for just 6.6% of the value of the final sale.
Low incomes also translate into numerous other issues associated with cocoa farming.
The Bitter Side of Cocoa Farming
The World Bank has established the threshold for extreme poverty at $1.90/day. Cocoa farmers in Ghana make $1/day, while those in Côte d’Ivoire make around $0.78/day—both significantly below the extreme poverty line.
Farmers are often unable to bear the costs of cocoa farming as a result of low incomes. In turn, they employ children, who miss out on education, are exposed to hazardous working conditions, and get paid little or no wages.
|Country||Cocoa Farmers Making $1/day or less||Children in Cocoa Agriculture|
|Côte d’Ivoire 🇨🇮||600,000||891,500|
To make matters worse, cocoa farming is primarily responsible for deforestation and illegal farming in Côte d’Ivoire and Ghana—adding environmental issues to the mix.
These interconnected problems call for action, so what is being done to fight them?
Combating Cocoa’s Concerns
Mars, Nestlé, and Hershey—some of the world’s biggest chocolate manufacturers—have made several pledges to eradicate child labor in cocoa farming over the last two decades, but haven’t reached their targets.
In addition, organizations such as UTZ Certified, Rainforest Alliance, and Fairtrade are working to increase traceability in the supply chain by selling ‘certified cocoa’, sourced from farms that prohibit child labor.
More recently, Côte d’Ivoire and Ghana announced a fixed premium of US$400/tonne on cocoa futures, aiming to improve farmer livelihoods by creating a union for cocoa, also known colloquially as the “COPEC” for the industry.
While these initiatives have had some positive impacts, more still needs to be done to successfully eradicate large-scale child labor and poverty of those involved in cocoa’s bittersweet supply chain.
The Economics of Coffee in One Chart
What makes your cup of coffee possible, and how much does it really cost? Here’s how the $200B coffee supply chain breaks down economically.
Breaking Down the Economics of Coffee
What goes into your morning cup of coffee, and what makes it possible?
The obvious answer might be coffee beans, but when you start to account for additional costs, the scope of a massive $200+ billion coffee supply chain becomes clear.
From the labor of growing, exporting, and roasting the coffee plants to the materials like packaging, cups, and even stir sticks, there are many underlying costs that factor into every cup of coffee consumed.
The above graphic breaks down the costs incurred by retail coffee production for one pound of coffee, equivalent to about 15 cups of 16 ounce brewed coffee.
The Difficulty of Pricing Coffee
Measuring and averaging out a global industry is a complicated ordeal.
Not only do global coffee prices constantly fluctuate, but each country also has differences in availability, relative costs, and the final price of a finished product.
That’s why a cup of 16 oz brewed coffee in the U.S. doesn’t cost the same in the U.K., or Japan, or anywhere else in the world. Even within countries, the differences of a company’s access to wholesale beans will dictate the final price.
To counteract these discrepancies, today’s infographic above uses figures sourced from the Specialty Coffee Association which are illustrative but based on the organization’s Benchmarking Report and Coffee Price Report.
What they end up with is an estimated set price of $2.80 for a brewed cup of coffee at a specialty coffee store. Each store and indeed each country will see a different price, but that gives us the foundation to start backtracking and breaking down the total costs.
From Growing Beans to Exporting Bags
To make coffee, you must have the right conditions to grow it.
The two major types of coffee, Arabica and Robusta, are produced primarily in subequatorial countries. The plants originated in Ethiopia, were first grown in Yemen in the 1600s, then spread around the world by way of European colonialism.
Today, Brazil is far and away the largest producer and exporter of coffee, with Vietnam the only other country accounting for a double-digit percentage of global production.
|Country||Coffee Production (60kg bags)||Share of Global Coffee Production|
How much money do growers make on green coffee beans? With prices constantly fluctuating each year, they can range from below $0.50/lb in 2001 to above $2.10/lb in 2011.
But if you’re looking for the money in coffee, you won’t find it at the source. Fairtrade estimates that 125 million people worldwide depend on coffee for their livelihoods, but many of them are unable to earn a reliable living from it.
Instead, one of the biggest profit margins is made by the companies exporting the coffee. In 2018 the ICO Composite price (which tracks both Arabica and Robusta coffee prices) averaged $1.09/lb, while the SCA lists exporters as charging a price of $3.24/lb for green coffee.
Roasters might be charged $3.24/lb for green coffee beans from exporters, but that’s far from the final price they pay.
First, beans have to be imported, adding shipping and importer fees that add $0.31/lb. Once the actual roasting begins, the cost of labor and certification and the inevitable losses along the way add an additional $1.86/lb before general business expenses.
By the end of it, roasters see a total illustrated cost of $8.73/lb.
|Net Profit (%)||7.1%|
When it comes time for their profit margin, roasters quote a selling price of around $9.40/lb. After taxes, roasters see a net profit of roughly $0.44/lb or 7.1%.
For consumers purchasing quality, roasted coffee beans directly through distributors, seeing a 1lb bag of roasted whole coffee for $14.99 and higher is standard. Retailers, however, are able to access coffee closer to the stated wholesale prices and add their own costs to the equation.
One pound of roasted coffee beans will translate into about 15 cups of 16 ounce (475 ml) brewed coffee for a store. At a price of $2.80/cup, that translates into a yield of $42.00/lb of coffee.
That doesn’t sound half bad until you start to factor in the costs. Material costs include the coffee itself, the cups and lids (often charged separately), the stir sticks and even the condiments. After all, containers of half-and-half and ground cinnamon don’t pay for themselves.
Factoring them all together equals a retail material cost of $13.00/lb. That still leaves a healthy gross profit of $29.00/lb, but running a retail store is an expensive business. Add to that the costs of operations, including labor, leasing, marketing, and administrative costs, and the total costs quickly ramp up to $35.47/lb.
In fact, when accounting for additional costs for interest and taxes, the SCA figures give retailers a net profit of $2.90/lb or 6.9%, slightly less than that of roasters.
A Massive Global Industry
Coffee production is a big industry for one reason: coffee consumption is truly a universal affair with 2.3 million cups of coffee consumed globally every minute. By total volume sales, coffee is the fourth most-consumed beverage in the world.
That makes the retail side of the market a major factor. Dominated by companies like Nestlé and Jacobs Douwe Egberts, global retail coffee sales in 2017 reached $83 billion, with an average yearly expenditure of $11 per capita globally.
Of course, some countries are bigger coffee drinkers than others. The largest global consumers by tonnage are the U.S. and Brazil (despite also being the largest producer and exporter), but per capita consumption is significantly higher in European countries like Norway and Switzerland.
The next time you sip your coffee, consider the multilayered and vast global supply chain that makes it all possible.
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