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Area rocks and asteroid mud are dear, aren’t the most costly supplies utilized in science

October 30, 2023
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Area rocks and asteroid mud are dear, aren’t the most costly supplies utilized in science
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After a journey of seven years and almost 4 billion miles, NASA’s OSIRIS-REx spacecraft landed gently within the Utah desert on the morning of Sept. 24, 2023, with a treasured payload. The spacecraft introduced again a pattern from the asteroid Bennu.

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Roughly half a pound of fabric collected from the 85 million-ton asteroid (77.6 billion kg) will assist scientists be taught concerning the formation of the photo voltaic system, together with whether or not asteroids like Bennu embody the chemical substances for all times.

NASA’s mission was budgeted at US$800 million and can find yourself costing round $1.16 billion for slightly below 9 ounces of pattern (255 g). However is that this the most costly materials recognized? Not even shut.

I’m a professor of astronomy. I exploit Moon and Mars rocks in my instructing and have a modest assortment of meteorites. I marvel at the truth that I can maintain in my hand one thing that’s billions of years previous from billions of miles away.

The price of pattern return

A handful of asteroid works out to $132 million per ounce, or $4.7 million per gram. That’s about 70,000 instances the price of gold, which has been within the vary of $1,800 to $2,000 per ounce ($60 to $70 per gram) for the previous few years.

The primary extraterrestrial materials returned to Earth got here from the Apollo program. Between 1969 and 1972, six Apollo missions introduced again 842 kilos (382 kg) of lunar samples.

The total price tag for the Apollo program, adjusted for inflation, was $257 billion. These Moon rocks had been a relative cut price at $19 million per ounce ($674 thousand per gram), and naturally Apollo had further worth in demonstrating applied sciences for human spaceflight.

NASA is planning to convey samples again from Mars within the early 2030s to see if any comprise traces of historical life. The Mars Pattern Return mission goals to return 30 sample tubes with a total weight of a pound (450 g). The Perseverance rover has already cached 10 of these samples.

Nonetheless, costs have grown as a result of the mission is complicated, involving a number of robots and spacecraft. Bringing again the samples may run $11 billion, placing their price at $690 million per ounce ($24 million per gram), 5 instances the unit price of the Bennu samples.

Some area rocks are free

Some area rocks price nothing. Nearly 50 tons of free samples from the photo voltaic system rain down on the Earth day-after-day. Most fritter away within the environment, but when they attain the bottom they’re referred to as meteorites, and most of these come from asteroids.

Meteorites can get pricey as a result of it may be tough to acknowledge and retrieve them. Rocks all look comparable until you’re a geology skilled.

Most meteorites are stony, called chondrites, and they are often purchased on-line for as little as $15 per ounce (50 cents per gram). Chondrites differ from regular rocks in containing round grains called chondrules that fashioned as molten droplets in area on the delivery of the photo voltaic system 4.5 billion years in the past.

A chondrite from the Viñales meteorite, which originated from the asteroid belt between Mars and Jupiter.

A chondrite from the Viñales meteorite, which originated from the asteroid belt between Mars and Jupiter. (Picture credit score: Ser Amantio di Nicolao/Wikimedia Commons, CC BY-SA)

Iron meteorites are distinguished by a darkish crust, attributable to melting of the floor as they arrive by the environment, and an inner sample of lengthy metallic crystals. They price $50 per ounce ($1.77 per gram) and even increased. Pallasites are stony-iron meteorites laced with the mineral olivine. When minimize and polished, they’ve a translucent yellow-green coloration and might price over $1,000 per ounce ($35 per gram).

Various meteorites have reached us from the Moon and Mars. Near 600 have been acknowledged as coming from the Moon, and the largest, weighing 4 kilos (1.8 kg), bought for a worth that works out to be about $4,700 per ounce ($166 per gram).

An iron meteorite.

An iron meteorite. (Picture credit score: Llez/Wikimedia Commons, CC BY-SA)

About 175 meteorites are recognized as having come from Mars. Buying one would price about $11,000 per ounce ($388 per gram).

Researchers can work out where meteorites come from through the use of their touchdown trajectories to mission their paths again to the asteroid belt or evaluating their composition with completely different courses of asteroids. Specialists can inform the place Moon and Mars rocks come from by their geology and mineralogy.

The limitation of those “free” samples is that there isn’t a solution to know the place on the Moon or Mars they got here from, which limits their scientific usefulness. Additionally, they begin to get contaminated as quickly as they land on Earth, so it’s laborious to inform if any microbes inside them are extraterrestrial.

Costly components and minerals

Some components and minerals are costly as a result of they’re scarce. Easy elements in the periodic table have low costs. Per ounce, carbon prices one-third of a cent, iron prices 1 cent, aluminum prices 56 cents, and even mercury is lower than a greenback (per 100 grams, carbon prices $2.40, iron prices lower than a cent and alumnium prices 19 cents). Silver is $14 per ounce (50 cents per gram), and gold, $1,900 per ounce ($67 per gram).

Seven radioactive elements are extraordinarily uncommon in nature and so tough to create within the lab that they eclipse the value of NASA’s Mars Pattern Return. Polonium-209, the most costly of those, prices $1.4 trillion per ounce ($49 billion per gram).

Gems could be costly, too. High-quality emeralds are 10 instances the price of gold, and white diamonds are 100 instances the value of gold.

a diamond.

Excessive-quality white diamonds can price tens of millions of {dollars}. (Picture credit score: AP Picture/Mary Altaffer)

Some diamonds have a boron impurity that offers them a vivid blue hue. They’re present in solely a handful of mines worldwide, and at $550 million per ounce ($19 million per gram) they rival the price of the upcoming Mars samples – an oz is 142 carats, however only a few gems are that enormous.

The most expensive synthetic material is a tiny spherical “cage” of carbon with a nitrogen atom trapped inside. The atom contained in the cage is extraordinarily secure, so can be utilized for timekeeping. Endohedral fullerenes are manufactured from carbon materials which may be used to create extraordinarily correct atomic clocks. They’ll price $4 billion per ounce ($141 million per gram).

Costliest of all

Antimatter happens in nature, however it’s exceptionally uncommon as a result of any time an antiparticle is created it shortly annihilates with a particle and produces radiation.

The particle accelerator at CERN can produces 10 million antiprotons per minute. That appears like quite a bit, however at that rate it might take billions of years and price a billion billion (1018) {dollars} to generate an oz (3.5 x 1016 {dollars} per gram).

Warp drives as envisaged by “Star Trek,” that are powered by matter-antimatter annihilation, must wait.

This text is republished from The Conversation beneath a Inventive Commons license. Learn the original article.

The views expressed are these of the writer and don’t essentially mirror the views of the writer.



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