Tópico da ciência

[Winjer]

Um bom video para entender o que é a overboard da Hendo, que está em kickstarter.

[XTREMVZ]

Total scam.. Então e a tecnologia Maglev que já existe há anos?
Estão a falar de uma hoverboard para puro marketing

[Winjer]

Viste o video e os motivos pelo qual ele considera aquilo burla?

[XTREMVZ]

Vi. O kickstart não se cinge às hoverboards, querem ir além.

[Winjer]

Realmente não viste o video...

[Jorge-Vieira]

Pessoal, daqui a 15 minutos no Discovery Channel vai dar o documentário sobre a sonda que aterrou no cometa.

[Winjer]

Já podemos explorar o espaço à vontade. Finalmente podemos tirar bons cafés sem gravidade

The first zero-g real coffee machine arrives at the Space Station (thanks to the Italians, of course)

Yesterday morning, Italy’s first female astronaut arrived at the International Space Station, carrying — well, more accurately, clutching in her arms like a first-born child — the first zero-g Certified Italian Espresso coffee machine. The machine, called the ISSpresso, was created by a couple of Italian companies after another Italian astronaut returned from the space station in 2012 and complained about the lack of good coffee while in Earth orbit. This might just seem like a very costly first-world frivolity at the expense of real science, but the introduction of a coffee machine to the ISS isn’t just for fun: The good times that will be enjoyed over a hot plastic pouch of perk are expected to go a long way towards reducing the extreme isolation and stress that astronauts experience aboard the ISS.The ISSpresso was developed by Lavazza and Argotec — both based out of Turin, Italy, with the former being one of the top coffee machine companies in Europe. The machine, which weighs in at a bulky 20 kilograms (44 lbs), was delivered by the three Expedition 42/43 astronauts — including Samantha Cristoforetti, Italy’s first female astronaut.
How the ISSpresso coffee machine works

While creating espresso is fairly simple here on Earth, forcing high-pressure water through coffee grounds is a complex and dangerous task when you’re 300 miles above Earth, with no gravity assistance and only a few millimeters of easily-punctured aluminium protecting you from the infinite harshness of space.
The ISSpresso, then, is not like your Starbucks espresso machine. The astronaut starts by filling a pouch of water from the ISS’s water reserve and connecting it to the ISSpresso’s input valve. The water is then aspirated, pressurized (to 9 bar), and heated to 94 degrees Celsius (201F) — optimal espresso-making temperature. The water is then shot down a pipe that can withstand up to 400 bar, through a Keurig-like capsule of coffee grounds, and into another pouch. The astronaut then (carefully) drinks the coffee through a straw. According to Lavazza, the end result is a “certified” pouch of Italian espresso, and tastes pretty good — though I suspect the lack of aroma (it’s a sealed system) probably detracts from the experience (and taste) somewhat.
ISSpresso, squirting espresso into a pouch

Due to the lack of gravity on board the space station, the ISSpresso can’t yet produce a latte or flat white. On Earth, gravity is used to separate the steamed foam from the liquid milk — up in space, they’d have to use a centrifuge, which might be taking things just a little too far. (Plus, without gravity, would the milk even float on the coffee anyway?)
The ISSpresso machine will be the centerpiece of the space station’s new “corner cafe,” which will be a place for Expedition astronauts to kick back, unwind, and reflect over a pouch of coffee. Astronauts usually spend about six months on the ISS, which can be quite isolating when you absolutely cannot return to Earth to see your friends and family until the end of the mission. Living in odd conditions and carrying out space walks can obviously be rather stressful, too.
The first interplanetary coffee machine joins the first zero-g 3D printer, which was carried to the International Space Station back in September. Like the ISSpresso, the 3D printer serves a scientific purpose: Being able to build stuff in space, rather than brute-force launching everything from within Earth’s gravitational grip, would make deep-space exploration and eventual colonization a much more realistic prospect. Obviously, if there’s a decent cup of coffee waiting on the surface of Mars, humanity’s first interplanetary colonists might be a little more willing to leave home.

[Jorge-Vieira]

Amanhã já sei onde vou tomar café, a que horas é a nave lá para cima

[Winjer]

Could Life Be Older Than Earth?

[Jorge-Vieira]

NASA has successfully 3D printed the first object on the ISS

NASA is doing some cool things on-board the International Space Station, with the US space agency taking up a 3D printer and printing out some cool faceplate.





The experiment has revealed to NASA that parts stick to the print tray much more in space and its microgravity, than they do on Earth. It's possible that plastic layers bond differently in zero-gravity, than they do here on Earth. More 3D-printed objects will be printed, but they won't be coming back down to Earth until next year.

Link:
http://www.tweaktown.com/news/41451/...iss/index.html

[Winjer]

A capacidade de fazer certos elementos no espaço, sem terem de vir à terra busca-los deve facilitar a vida na ISS.

E a possibilidade de termos formas diferentes no comportamento de certos materiais com pouca gravidade, pode significar novas formas de produção que beneficiam todos.

[Jorge-Vieira]

Sim, esta tecnologia é muito util, porque eles no espaço têm sempre uma maquina que lhes pode fazer alguma coisa sem que necessitem sem se deslocar á terra ou enviar uma missão espacial lá para lhes fornecer a peça.
Não tenho duvidas que mesmo aqui na Terra esta tecnologia vai ter muitas utilizações mesmo a longa distancia, entre uma empresa e uma filial por exemplo ou até na medicina.

[Winjer]

Esta experiência caseira está muito fixe.

[Jorge-Vieira]

Está fixe a experiencia, mas já conhecia esse efeito sobre os liquidos.

[Winjer]

Mas a questão é o que causa esse efeito.