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Astronauts might sooner or later find yourself consuming asteroids

October 6, 2024
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Astronauts might sooner or later find yourself consuming asteroids
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Sample taken from Ryugu

Samples from asteroid Ryugu

JAXA

Future astronauts might eat a nutritionally excellent weight-reduction plan constituted of micro organism reared on ground-up asteroids, to supply a type of milkshake or yogurt.

Whereas astronauts on the Worldwide Area Station have experimented with rising salad leaves, the overwhelming majority of meals consumed in area is transported from Earth. This might grow to be not possible for extra distant, longer-lasting area missions, so Joshua Pearce at Western College in Ontario, Canada, and his colleagues determined to analyze utilizing micro organism to transform carbon-containing compounds from asteroids into edible meals.

They’ve but to hold out this course of utilizing actual asteroids, however Pearce and his staff have carried out comparable experiments utilizing micro organism to interrupt down plastic from leftover military ration packets. To do that, they heated the plastic within the absence of oxygen, a course of referred to as pyrolysis, after which fed this to a combination of micro organism that eat carbon.

“While you have a look at the pyrolysis breakdown merchandise that we all know that micro organism can eat, after which what’s in asteroids, it matches up fairly fairly, truly,” says Pearce. “So I believe this may truly work.”

The collective micro organism find yourself trying “one thing like a caramel milkshake”, says Pearce, and the staff has additionally experimented with drying out this substance to supply one thing like yogurt or perhaps a powder.

Whereas which may not sound significantly appetising, Pearce says the micro organism are remarkably well-suited for human wants. “We did a dietary evaluation, and it seems to be nearly an ideal meals,” he says. “It seems that the micro organism consortium that we had been utilizing, kind of, has a 3rd every for protein, carbs and fats.”

If the thought is sound, a 500-metre-wide asteroid much like Bennu, which NASA visited in 2020, might feed between 600 and 17,000 astronauts for a yr, says Pearce. The precise quantity relies on how effectively the micro organism can digest the asteroid’s carbon compounds.

A completely operational asteroid meals undertaking would require an “industrial-sized tremendous machine” in area, he says, however the researchers hope to start testing the thought on a smaller scale within the coming yr, beginning off with coal after which transferring to meteorites which have fallen to Earth, which they’re at present engaged on a proposal for. “It’s tremendous costly and we’ve got to destroy [the meteorites], so the those who accumulate rocks weren’t pleased after we made these proposals,” says Pearce.

“There’s positively potential there, however it’s nonetheless a really futuristic and exploratory concept,” says Annemiek Waajen at Free College Amsterdam. “It’s good to consider these items, however when it comes to approach, there may be nonetheless fairly some improvement essential to have the ability to use these strategies.”

The success of the method will rely upon how most of the carbon compounds inside asteroids are appropriate for bacterial meals, says Waajen. Primarily based on meteorite compositions on Earth, it’s prone to be someplace in the midst of the vary the staff calculated, she says.

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