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People who attended two church events in GTA may have been exposed to COVID-19, officials say – One News Page

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Saturday, 5 September 2020 (24 minutes ago)


People who attended two church events in Toronto and Vaughan last month may have been exposed to COVID-19, public health officials say.

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No less than 5 house rocks headed in the direction of Earth this week, as Japan extends its Hayabusa2 asteroid-hunter mission – Nuhey

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In yet one more cosmic barrage of boulders and particles, NASA is warning of not less than 5 shut asteroid flybys this week, simply days after Japan’s house company introduced it will be extending its asteroid-hunter mission.

To kick issues off, on September 21 the 10-meter and 16-meter 2020 RQ6 and 2020 SJ2 will shoot previous the Earth at distances of 1.2 and 1.four million kilometers respectively. 

Earlier than anybody can breathe a sigh of aid, nonetheless, three extra Close to-Earth Objects are anticipated to fly previous on September 22.

© NASA

At 50m in diameter, or as tall because the Arc de Triomphe, the most important of the three, named 2020 RD5, will cross the Earth at 61,000 kph at a mercifully protected distance of 4 million kilometers. 

Not lengthy after, the paltry-by-comparison 2020 SM2, measuring simply 5.8m in diameter, or 4 Danny DeVitos stacked on prime of each other, will zoom previous Earth, simply 1.2 million km away. 

Citing the rear would be the 27-meter 2020 RB6, touring at a staggering 71,000 kph, set to cross our planet at a ‘shut strategy’ distance of two.5 million km.

Additionally on rt.com

Two asteroids set to cross Earth’s orbit simply hours aside as one other Nice Pyramid-sized house rock barrels our method

In the meantime, Japan’s Hayabusa 2 asteroid hunter, which efficiently landed on and ‘shot’ the asteroid Ryugu with a specialised bullet with the intention to acquire samples for evaluation again on Earth, is ready to increase its mission and contact down on one other house rock. 

The preliminary pattern is because of return to Earth this December, with a deliberate touchdown in Australia. 

Nevertheless, the Japanese Aerospace Exploration Company (JAXA) confirmed at a press briefing late final week that the mission can be prolonged and that, after a flying go to to drop off the pattern, the probe can be headed for the tennis-court-sized 1998 KY26 asteroid, positioned between Venus and Mars. 

Regardless of the obvious proximity to Earth, the spacecraft will spend 5 years cruising across the photo voltaic system earlier than observing yet one more asteroid en path to 1998 KY26, at which level mission management will determine whether or not a touchdown is possible or not.

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Chitin could be used to build tools and habitats on Mars, study finds – Ars Technica

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Enlarge / Scientists mixed chitin—an organic polymer found in abundance in arthropods, as well as fish scales—with a mineral that mimics the properties of Martian soil to create a viable new material for building tools and shelters on Mars.

Space aficionados who dream of one day colonizing Mars must grapple with the stark reality of the planet’s limited natural resources, particularly when it comes to building materials. A team of scientists from the Singapore University of Technology and Design discovered that, using simple chemistry, the organic polymer chitin—contained in the exoskeletons of insects and crustaceans—can easily be transformed into a viable building material for basic tools and habitats. This would require minimal energy and no need for transporting specialized equipment. The scientists described their experiments in a recent paper published in the journal PLOS ONE.

“The technology was originally developed to create circular ecosystems in urban environments,” said co-author Javier Fernandez. “But due to its efficiency, it is also the most efficient and scalable method to produce materials in a closed artificial ecosystem in the extremely scarce environment of a lifeless planet or satellite.”

As we previously reported, NASA has announced an ambitious plan to return American astronauts to the Moon and establish a permanent base there, with an eye toward eventually placing astronauts on Mars. Materials science will be crucial to the Artemis Moon Program’s success, particularly when it comes to the materials needed to construct a viable lunar (or Martian) base. Concrete, for instance, requires a substantial amount of added water in order to be usable in situ, and there is a pronounced short supply of water on both the Moon and Mars. And transport costs would be prohibitively high. NASA estimates that it costs around $10,000 to transport just one pound of material into orbit. 

So there has been much attention on the possibility of using existing materials on the Moon itself to construct a lunar base. Past proposals have called for 3D-printing with Sorel cement, which requires significant amounts of chemicals and water (consumables), and a rocklike material that would require both water and phosphoric acid as a liquid binder. And back in Marcha paper by an international team of scientists suggested that astronauts setting up a base on the Moon could use the urea in their urine as a plasticizer to create a concrete-like building material out of lunar soil.

As with the Moon, any plan to set up a habitable base on Mars must employ manufacturing technologies that make use of the red planet’s regolith. But the authors of the current paper point out that most terrestrial manufacturing strategies that could fit the bill typically require specialized equipment and a hefty amount of energy. However, “Nature presents successful strategies of life adapting to harsh environments,” the authors wrote. “In biological organisms, rigid structures are formed by integrating inorganic filler proceed from the environment at a low energy cost (e.g., calcium carbonate) and incorporated into an organic matrix (e.g., chitin) produced at a relatively high metabolic cost.”

Building a model with a 3D-printed lander module illustrates a possible scenario of fabricating habitats on Mars.
Enlarge / Building a model with a 3D-printed lander module illustrates a possible scenario of fabricating habitats on Mars.
N. Shiwei, S. Dritsas, J.G. Fernandez/PLOS ONE

Fernandez and his colleagues maintain that chitin is likely to be part of any planned artificial ecosystem because it is so plentiful in nature. It’s the primary component of fish scales and fungal cell walls, for example, as well as the exoskeletons of crustaceans and insects. In fact, insects have already been targeted as a key source of protein for a possible Martian base. And since the chitin component of insects has limited nutritional value for humans, extracting it to make building materials “does not hamper or compete with the food supply,” the authors wrote. “Rather, it is a byproduct of it.”

For their experiments, the researchers relied on fairly simple chemistry. They took chitosan derived from shrimp, dissolved it in acetic acid—a common byproduct of both aerobic and anaerobic fermentation—and combined it with a mineral equivalent to Martian soil to create their chitinous building material. They tested its properties by fashioning various objects out of it, most notably a functional wrench, which they tested by tightening a hexagonal bolt. While acknowledging that this would be unlikely to replace metallic tools for certain critical space applications, it proved hardy enough to sustain sufficient torque for small daily tasks.

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Next, the team tried molding the material in various geometries to study its potential as a building material via additive manufacturing, ranging from cylinders and cubes to objects with both rounded and angular shapes—including a little humanoid Martian figure. The scientists also demonstrated that the biolith could be used as makeshift mortar to effectively plug a small hole in a pipe. The pipe subsequently went several weeks without leakage. Finally, they built a full 3D-printed model of one possible design for a Martian habitat; it took just under two hours to complete. The researchers concluded that their results demonstrated the feasibility of such “closed-loop, zero-waste” solutions on Mars.

“Bioinspired manufacturing and sustainable materials are not a substituting technology for synthetic polymers, but an enabling technology defining a new paradigm in manufacturing, and allowing to do things that are unachievable by the synthetic counterparts,” said Fernandez. “We have demonstrated that they are key not only for our sustainability on Earth but also for one of the next biggest achievements of humanity: our transformation into an interplanetary species.”

DOI: PLOS ONE, 2020. 10.1371/journal.pone.0238606 (About DOIs).

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NASA updates plan to send the first woman to the moon by 2024 – KelownaNow

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NASA has shared an update in their ongoing plan to send the next group of astronauts to the moon’s surface.

The space agency says that they plan to land the first woman, and the next man on the moon in 2024.

Although this isn’t the time a woman has been sent into space, it’s a huge milestone in space exploration.

The mission is part of the Artemis program, which has been in the works for the past 18 months.

“With bipartisan support from Congress, our 21st century push to the Moon is well within America’s reach,” said NASA Administrator Jim Bridenstine.

“As we’ve solidified more of our exploration plans in recent months, we’ve continued to refine our budget and architecture. We’re going back to the Moon for scientific discovery, economic benefits, and inspiration for a new generation of explorers. As we build up a sustainable presence, we’re also building momentum toward those first human steps on the Red Planet.”

In its formal plan, NASA captures Artemis progress to date, identifying the key science, technology and human missions, as well as the commercial and international partnerships that will ensure we continue to lead in exploration and achieve our ambitious goal to land astronauts on the Moon.

The agency’s powerful new rocket, the Space Launch System (SLS), and the Orion spacecraft are closer than ever to their first integrated launch, said NASA.

The spacecraft is complete while the core stage and its attached four engines are undergoing a final series of tests that will culminate in a critical hot fire test this fall.

In 2024, Artemis III will be humanity’s return to the surface of the Moon — landing the first astronauts on the lunar South Pole.

After launching on SLS, astronauts will travel about 240,000 miles to lunar orbit aboard Orion, at which point they will directly board one of the new commercial human landing systems, or dock to the Gateway to inspect it and gather supplies before boarding the landing system for their expedition to the surface.

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