Espresso in Space

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Espresso in Space By www.BuyOrganicCoffee.org Espresso in Space By www.BuyOrganicCoffee.or g

Transcript of Espresso in Space

Page 1: Espresso in Space

Espresso in Space

By

www.BuyOrganicCoffee.org

Espresso in Space

By

www.BuyOrganicCoffee.or

g

Page 2: Espresso in Space

http://buyorganiccoffee.org/1379/espresso-in-space/

The fondest wish of Italian astronaut,

Samantha Cristoretti, was to have a cup of

espresso during her sojourn on the

International Space Station.

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An Italian made espresso machine arrived

on the most recent supply ship and now

there is espresso in space.

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The RT website reports on how real coffee hits space.

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Last month, the Dragon spacecraft, built and

operated by SpaceX, delivered the first-ever

space espresso machine, built by Italian

coffee company Lavazza and Italian

aerospace firm Argotec, to the space

station, along with special, zero-gravity

cups.

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Prior to the coffee machine's long-awaited

arrival, the only option aboard the orbiting

laboratory was powdered instant coffee. The

cups, co-designed by International Space

Station researcher Mark Weislogel and

astronaut Don Pettit, are peculiarly shaped

so that a sharp corner makes the liquid

inside stream toward a person's mouth when they drink from it.

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At last there is espresso in space. If there is an Irish astronaut will Irish coffee be next?

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Espresso in Space

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Liquids act strangely in zero gravity. They

float around like blobs. NASA Science explains the zero gravity coffee cup.

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High above our planet in the realm of

satellites and space stations, the familiar

rules of Earth do not apply. The midday sky

is as black as night. There is no up and no

down. Dropped objects do not fall, and hot

air does not rise.

Page 11: Espresso in Space

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Of all the strange things that happen up

there, however, it is possible that the strangest happens to coffee.

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Physics professor Mark Weislogel of

Portland State University has given a lot of

thought to coffee (and other fluids) in space, and he describes what happens:

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"For starters," he says, "it would be a chore

just getting the coffee into the cup. Absent

the pull of gravity, pouring liquids can be very tricky.”

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[BUT] If two solid surfaces meet at a narrow-

enough angle, fluids in microgravity

naturally flow along the join-no pumping

required. This capillary effect could be used

to guide all kinds of fluids through

spacecraft, from cryogenic fuel to recycled

waste water.

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The phenomenon is difficult to study on

Earth, where it is damped by gravity, yet on

the space station large scale corner flows

are easy to create and observe.

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Basically, one side of the cup has a sharp

interior corner. In the microgravity

environment of the space station, capillary

forces send fluid flowing along the channel

right into the lips of the drinker.

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"As you sip, more fluid keeps coming, and

you can enjoy your coffee in a weightless

environment - clear down to the last drop,"

says Pettit. "This may well be what future

space colonists use when they want to have

a celebration."

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Here is the zero gravity coffee cup. Notice the sharp right angle at the bottom that makes the liquids “turn the corner.”

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