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Category: space – Page 894

US needs megawatt class combat lasers to counter hypersonic missiles

Michael Griffin, the undersecretary for research and engineering, expects future budgets to provide funds for lasers that the missile defense agency can more rapidly develop and field. Space-control needs to have megawatt-class lasers.

Hypersonic weapons’ low signature in flight and high degree of maneuverability upon final approach to targets make the weapons difficult to defend against.

The last time the US really invested in transformative capabilities that overwhelmed adversaries [in Desert Storm] was the Reagan era.

A meteorite exploded over Cuba and its boom was captured on video

Space rocks come crashing down to Earth with somewhat startling regularity, and when they do they often create a big boom. When a meteorite detonates in Earth’s atmosphere it produces an explosion which researchers call bolides, or simply “fireballs.”

Most of the time, a fireball appears and disappears before anyone is quick enough to grab their smartphone and record it, so we’re left with dash cam videos and still images from stationary cameras to give us a glimpse of the event. Last week, a fireball came crashing down in Cuba and, in a rare treat, we actually get to hear it.

Russia Says the American Toilet on the Space Station Blew Up

One small step for man. One giant leap for…

Russian media is reporting that the American toilet on the International Space Station (ISS) burst late last week, spilling gallons of fluid that astronauts had to catch with towels.

Sure, it sounds like a story about an exceptionally bad roommate — but it might also be the latest escalation in the deterioration of relations between Russia and the U.S. in space, lending grim gravitas to the plumbing snafu.

Pee Tape

A source told Sputnik News, which is closely affiliated with the Russian government, that the toilet in the U.S. section of the ISS malfunctioned on Friday, spilling water into the microgravity environment. Water is a precious resource on the ISS, where filtration systems recycle shower water, sweat, and urine.

How easy will it be to build a Moon base?

Musk has yet to make a definite announcement about a Moon base. He has said we may need one just to get people fired up about Mars, and he is going to shoot someone around the Moon and back. I point this out because the first part of this article makes it seem like Musk has drawn up plans and announced them.

How can astronauts build a lunar base if traditional building materials are too heavy to load into a rocket?

What Happened to the 100,000-Hour LED Bulbs?

An excellent article on Hackaday addresses the lifetime of LED bulbs. To a certain degree, it also addresses the lifetime of LED’s themselves. However, the majority of the article investigates the various parts of the LED bulb, such as electronics and housings, and how they last. The article also addresses the issues of lumen depreciation and color change.

These issues are all important when thinking about long-term use in space applications.

Early adopters of LED lighting will remember 50,000 hour or even 100,000 hour lifetime ratings printed on the box. But during a recent trip to the hardware store the longest advertised lifetime I found was 25,000 hours. Others claimed only 7,500 or 15,000 hours. And yes, these are brand-name bulbs from Cree and GE.

So, what happened to those 100,000 hour residential LED bulbs? Were the initial estimates just over-optimistic? Was it all marketing hype? Or, did we not know enough about LED aging to predict the true useful life of a bulb?

I put these questions to the test. Join me after the break for some background on the light bulb cartel from the days of incandescent bulbs (not a joke, a cartel controlled the life of your bulbs), and for the destruction of some modern LED bulbs to see why the lifetimes are clocking in a lot lower than the original wave of LED replacements.

Scientists reveal true shape of Milky Way: It’s warped & twisted

It’s even more fascinating than we thought.

The Milky Way looks nothing like the flat space pancake it is usually depicted as. The newly-created and most accurate 3D map of our galaxy reveals that it’s warped and twisted, and even more fascinating.

A group of astronomers from Australia and China have built their “intuitive and accurate three-dimensional picture” by mapping the so-called “classical Cepheids.”

Burning their fuel quickly, those pulsating stars that live fast and die young are 100,000 times brighter than the Sun. The combination of their pulsation periods and known luminosity allowed the scientists to determine their location with the high accuracy of between 3 to 5 percent.

These Four Universities Are Trying to Figure Out Space Law

Jack Beard, a professor in the University of Nebraska College of Law’s Space, Cyber and Telecommunications Law Program, told Politico that the Woomera Manual on the International Law of Military Space Operations “will become the definitive document on military and security law as it applies to space.”

The Woomera Manual won’t actually lay out any new guidelines. Instead it will organize and present the laws that are already on the books so that politicians, industry leaders, and others can make better informed decisions regarding activity in space.

Given the fact that the Outer Space Treaty, which banned military actions in outer space, has all but been tossed aside, it’s unclear how much they’ll actually listen.

This Wild Moon Base Idea Came from Architecture Students (Video)

Interesting concept.

Architectural students working with the European Space Agency (ESA) have created a new concept for a sustainable lunar habitat.

The ESA’s astronaut center in Cologne, Germany, partners with universities and research institutions to study moon-related concepts in preparation for future missions. Angelus Chrysovalantis Alfatzis is one of the researchers who has contributed to the development of a promising concept for a moon base, according to a statement from ESA.

“I always strive to find material and structural solutions in accordance with the resources available on site,” Alfatzis, who is in his final year of the architectural engineering program at the National Technical University of Athens, Greece, said in the statement. “At the moment, my focus is on using unprocessed lunar soil for construction and the architectural applications of this [technique].” [Moon Base Visions: How to Build a Lunar Colony (Photos)].