Futurist Foresight

An interesting gif of orbiting 10km above the lunar surface. (Just because.)

dvdp: Orbiting 10km (6mi) above Moon
NASA GRAIL mission, Ebb spacecraft, Dec. 14, 2012

(via abcstarstuff)

3D printing will be an invaluable tool for a colony.

abcstarstuff:

Building a lunar base with 3D printing

Setting up a lunar base could be made much simpler by using a 3D printer to build it from local materials. Industrial partners including renowned architects Foster + Partners have joined with ESA to test the feasibility of 3D printing using lunar soil.

“Terrestrial 3D printing technology has produced entire structures,” said Laurent Pambaguian, heading the project for ESA.

“Our industrial team investigated if it could similarly be employed to build a lunar habitat.”

Foster + Partners devised a weight-bearing ‘catenary’ dome design with a cellular structured wall to shield against micrometeoroids and space radiation, incorporating a pressurised inflatable to shelter astronauts.

A hollow closed-cell structure – reminiscent of bird bones – provides a good combination of strength and weight.

The base’s design was guided in turn by the properties of 3D-printed lunar soil, with a 1.5 tonne building block produced as a demonstration.

“3D printing offers a potential means of facilitating lunar settlement with reduced logistics from Earth,” added Scott Hovland of ESA’s human spaceflight team.

“The new possibilities this work opens up can then be considered by international space agencies as part of the current development of a common exploration strategy.”

“As a practice, we are used to designing for extreme climates on Earth and exploiting the environmental benefits of using local, sustainable materials,” remarked Xavier De Kestelier of Foster + Partners Specialist Modelling Group. “Our lunar habitation follows a similar logic.”

The UK’s Monolite supplied the D-Shape printer, with a mobile printing array of nozzles on a 6 m frame to spray a binding solution onto a sand-like building material.

3D ‘printouts’ are built up layer by layer – the company more typically uses its printer to create sculptures and is working on artificial coral reefs to help preserve beaches from energetic sea waves.

“First, we needed to mix the simulated lunar material with magnesium oxide. This turns it into ‘paper’ we can print with,” explained Monolite founder Enrico Dini.

“Then for our structural ‘ink’ we apply a binding salt which converts material to a stone-like solid.

“Our current printer builds at a rate of around 2 m per hour, while our next-generation design should attain 3.5 m per hour, completing an entire building in a week.”

Just a reminder that we used to explore the Moon.

(via electricspacekoolaid)

Celebrating NASA and the Apollo Program - Apollo 17 EVA’s started 40 years ago today.

hellyesnasa:

If Cernan or Schmitt stood at the right spot on Taurus-Littrow, this is what they might have seen.

Apollo 17 EVA’s started 40 years ago today.

NASA: Back to the Moon! (Please don`t toy with us, just make it happen!)

electricspacekoolaid:

ikenbot: NASA May Unveil New Manned Moon Missions Soon

NASA is serious about sending astronauts back to the moon’s neighborhood and will likely unveil its ambitious plans soon now that President Barack Obama has been re-elected, experts say.

Image: Artist’s concept of astronauts in an Orion capsule helping direct robotic teleoperations on the moon’s farside. Credit: Lockheed Martin

The space agency has apparently been thinking about setting up a manned outpost beyond the moon’s far side, both to establish a human presence in deep space and to build momentum toward a planned visit to an asteroid in 2025.

The new plans have probably already been cleared with the Obama Administration but have been kept under wraps in case Republican candidate Mitt Romney won Tuesday night’s (Nov. 6) presidential election, said space policy expert John Logsdon, a professor emeritus at George Washington University.

“NASA has been evolving its thinking, and its latest charts have inserted a new element of cislunar/lunar gateway/Earth-moon L2 sort of stuff into the plan,” Logsdon told SPACE.com. (The Earth-moon L2 is a so-called libration point where the two bodies’ gravitational pulls roughly balance out, allowing spacecraft to essentially park there.)

“They’ve been holding off announcing that until after the election,” Logsdon added, noting that Romney had pledged to reassess and possibly revise NASA’s missions and direction.

A new vision of human space exploration

In 2010, President Obama directed NASA to work toward sending astronauts to a near-Earth asteroid by 2025, then on to the vicinity of Mars by the mid-2030s. To reach such deep-space destinations, the agency is developing a huge rocket called the Space Launch System (SLS) and a crew capsule named Orion.

But astronauts likely won’t head straight to a space rock when SLS and Orion are ready to fly together in 2021. In the last year, word has begun leaking out that NASA wants to explore Earth-moon L2, a point in space that lies beyond the moon’s far side, as a precursor.

Rumors currently point toward parking a spacecraft at the Earth-moon L2 gateway, so NASA (and perhaps international partners) can learn more about supporting humans in deep space. Astronauts stationed there could also aid in lunar exploration — by teleoperating rovers on the moon’s surface, for example.

NASA officials think they can pull off such manned missions without busting their budget, which stands at $17.7 billion in the proposed 2013 federal budget.

“They’re not talking about plans that imply significant budget increases,” Logsdon said. “It gives a more focused use for SLS and Orion before an asteroid mission.”

Moon missions coming soon?

Exploration of Earth-moon L2 could get started as early as 2021 with the first manned flight of SLS and Orion, which NASA calls Exploration Mission 2. (Exploration Mission 1 is the initial, unmanned test launch of SLS, slated for late 2017.)

“I’m not privy to the specifics of this, but one could conceive of the second SLS mission being the start of activity in cislunar space, rather than just being a lunar orbit mission,” Logsdon said.

We may know soon enough. NASA higher-ups have dropped hints recently that a big announcement may indeed be in the offing before too much longer.

“We just recently delivered a comprehensive report to Congress outlining our destinations which makes clear that SLS will go way beyond low-Earth orbit to explore the expansive space around the Earth-moon system, near-Earth asteroids, the moon, and ultimately, Mars,” NASA deputy chief Lori Garver said at a conference in September.

“Let me say that again: We’re going back to the moon, attempting a first-ever mission to send humans to an asteroid and actively developing a plan to take Americans to Mars,” Garver added.

Space colonization: A look at farming on future colonies in space, be they on the Moon or elsewhere.

ralphewig:

Lunar Farming - Once we leave cradle Earth, we’ll have to grow food in rather hostile places. One way to do this is using artificial lighting in sealed farming environments. Using nuclear powered LED’s is one possible approach to get your tofu on when out in the middle of nowhere. The research is clearly relevant for space applications, but also has many uses on Earth itself when trying to grow food in typically unsuitable regions of the planet.

Simply put, can we ship enough food and water from home to keep astronauts fat n’ happy? For a little while, sure, but semi-permanent outposts on the Moon will need their own farms, and that means LEDs. And nukes. […] In order to keep one human alive (with both food and oxygen), you’ll need approximately 50 square meters of plant life, and to keep that plant life alive, you’ll need nutrients, water and light. Plants don’t need sunlight to do this; as we’ve seen, LEDs work just fine. […] LEDs are compact, efficient, and last tens of thousands of hours. We’ve seen how well this works down here on Earth, so now’s the time to take it to space.

RIP Neil Armstrong. Your where a guiding light and an inspiration.

nedhepburn:

Dead at 82, Neil Armstrong. 

(via theatlantic)

Rover: Distance records for rovers traveling on the surface of the Moon and Mars

universalnomad:

decaturjim:

Space Driving: How far have we come?

Opportunity is catching up an might pass them all! Go Oppy!

Toxic lunar dust?

sagansense:

The Moon Is Toxic

As our closest neighbor in space, a time-capsule of planetary evolution and the only world outside of Earth that humans have stepped foot on, the Moon is an obvious and ever-present location for future exploration by humans. The research that can be done on the Moon — as well as from it — will be invaluable to science. But the only times humans have visited the Moon were during quick, dusty  jaunts on its surface, lasting only 2-3 days each before departing. Long-term human exposure to the lunar environment has never been studied in depth, and it’s quite possible that — in addition to the many inherent dangers of living and working in space – the Moon itself may be toxic to humans.

An international team of researchers has attempted to quantify the health dangers of the Moon — or at least its dust-filled regolith. In a paper titled “Toxicity of Lunar Dust” (D. Linnarsson et al.) the health hazards of the Moon’s fine, powdery dust — which plagued Apollo astronauts both in and out of their suits — are investigated in detail (or as best as they can be without actually being on the Moon with the ability to collect pristine samples.)

Within their research the team, which included physiologists, pharmacologists, radiologists and toxicologists from 5 countries, investigated some of the following potential health hazards of lunar dust:

Inhalation. By far the most harmful effects of lunar dust would come from inhalation of the particulates. Even though lunar explorers would be wearing protective gear, suit-bound dust can easily make its way back into living and working areas — as Apollo astronauts quickly discovered. Once inside the lungs the super-fine, sharp-edged lunar dust could cause a slew of health issues, affecting the respiratory and cardiovascular system and causing anything from airway inflammation to increased risks of various cancers. Like pollutants encountered on Earth, such as asbestos and volcanic ash, lunar dust particles are small enough to penetrate deep within lung tissues, and may be made even more dangerous by their long-term exposure to proton and UV radiation. In addition, the research suggests a microgravity environment may only serve to ease the transportation of dust particles throughout the lungs.

Skin Damage. Lunar regolith has been found to be very sharp-edged, mainly because it hasn’t undergone the same kind of erosive processes that soil on Earth has. Lunar soil particles are sometimes even coated in a glassy shell, the result of rock vaporization by meteorite impacts. Even the finer particles of dust — which constitute about 20% of returned lunar soil samples — are rather sharp, and as such pose a risk of skin irritation in instances of exposure. Of particular note by the research team is abrasive damage to the outer layer of skin at sites of “anatomical prominence”, i.e., fingers, knuckles, elbows, knees, etc.

“The dust was so abrasive that it actually wore through three layers of Kevlar-like material on Jack [Schmitt’s] boot.”

– Professor Larry Taylor, Director of the Planetary Geosciences Institute, University of Tennessee (2008)

Eye Damage. Needless to say, if particles can pose abrasive damage to human skin, similar danger to the eyes is also a concern. Whether lunar dust makes its way into the eye via airborne movement (again, much more of a concern in microgravity) or through direct contact from fingers or another dust-coated object, the result is the same: danger of abrasion. Having a scratched cornea is no fun, but if you’re busy working on the Moon at the time it could turn into a real emergency.

While the research behind the paper used data about airborne pollutants known to exist on Earth and simulated lunar dust particles, actual lunar dust is harder to test. The samples returned by the Apollo missions have not been kept in a true lunar-like environment — being removed from exposure to radiation and not stored in a vacuum, for instance — and as such may not accurately exhibit the properties of actual dust as it would be encountered on the Moon. The researchers conclude that only studies conducted on-site will fill the gaps in our knowledge of lunar dust toxicity. Still, the research is a step in the right direction as it looks to ensure a safe environment for future explorers on the Moon, our familiar — yet still alien — satellite world.

Read the team’s paper in full here.

“The Apollo astronauts reported undesirable effects affecting the skin, eyes and airways that could be related to exposure to the dust that had adhered to their space suits during their extravehicular activities and was subsequently brought into their spacecraft.”

– Dag Linnarsson, lead author, Toxicity of Lunar Dust

Top image: Apollo 16 astronaut Charlie Duke with a dust-coated LRV. Side image: a dusty Gene Cernan in the LM at the end of an Apollo 17 EVA. (NASA/JSC)