SERVING THE QUANTITATIVE FINANCE COMMUNITY

rmax
Posts: 6080
Joined: December 8th, 2005, 9:31 am

### Re: News from Outer Space

Quantum 'compass' could allow navigation without relying on satellites

"Most navigation today relies on a global navigation satellite system (GNSS), such as GPS, which sends and receives signals from satellites orbiting the Earth. The quantum accelerometer is a self-contained system that does not rely on any external signals."
a non-quantum compass doesn't need a satellite either
This should have been posted to bad reporting. It is not a Quantum Compass. It is more akin to a quantum gyroscope for measuring acceleration. It does not find north through any use of magnetic field  - unless I am missing something.

katastrofa
Posts: 8750
Joined: August 16th, 2007, 5:36 am
Location: Alpha Centauri

### Re: News from Outer Space

I think you're correct. It measures proper acceleration. However, since it tells you precisely how much and in which direction you move, it can serve as a compass.

Collector
Posts: 4411
Joined: August 21st, 2001, 12:37 pm

### Re: News from Outer Space

"although quasars turn off, transitioning into mere galaxies, the process should take 10,000 years or more. This quasar appeared to have shut down in less than 10 years — a cosmic eyeblink."

Galactic Beacons Get Snuffed Out in a Cosmic Eyeblink

So quasars from 10 000 years to 10 years, what is next? I think some will love this quasar finding and spin it together with ideas that the earth only 6,000 old

Cuchulainn
Posts: 61129
Joined: July 16th, 2004, 7:38 am
Location: Amsterdam
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### Re: News from Outer Space

Nonsense! We all know the earth is 8000 years old.
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Every Time We Teach a Child Something, We Keep Him from Inventing It Himself
Jean Piaget

katastrofa
Posts: 8750
Joined: August 16th, 2007, 5:36 am
Location: Alpha Centauri

### Re: News from Outer Space

It depends on whether you count from the birth or conception.

Cuchulainn
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### Re: News from Outer Space

It depends on whether you count from the birth or conception.
Was that Eastern Standard Time or Rocky Mountain Time?

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Every Time We Teach a Child Something, We Keep Him from Inventing It Himself
Jean Piaget

ppauper
Posts: 70239
Joined: November 15th, 2001, 1:29 pm

### Re: News from Outer Space

Burt Rutan's spaceship two has crashed1 Dead, 1 Injured After Virgin Galactic Spaceship Crashes During Test Flight Over Mojave Desert

Virgin Galactic flies its first astronauts to the edge of space, taking one step closer to space tourism

they seem to have shifted the goalposts

Boundary of space being reconsidered as Virgin Galactic test program advances
One question is what altitude SpaceShipTwo will need to reach in order to have considered to reach space. While there is no formal boundary of space in treaties or law, the industry has frequently used the altitude of 100 kilometers, known as Karman Line after the late aerospace engineer Theodore von Kármán. That definition gained prominence during the Ansari X Prize competition for commercial suborbital vehicles, won by SpaceShipOne in 2004 when it flew above that altitude twice within two weeks, as well as during a test flight three months earlier.
Microsoft's Paul Allen provided $25M funding for Spaceship One. The prize was$10M.
I remember seeing Burt Rutan's Spaceship One on CNN. Rutan was asked how it felt to win the Ansari X Prize, and he was like, "The what now?"
Spaceship One reached over 100km, the Karman Line, and now hangs in the National Air and Space Museum on the Mall in DC.

Spaceship Two's flight, reported in the link above, reached 82km, and I've read that Branson was trying to get space scientists to redefine space. If there's a billionaire involved (Richard Branson, see the discussion on motorboating), you've got to wonder if there was any quid pro quo, be it a new telescope or a trip to a private island.

Collector
Posts: 4411
Joined: August 21st, 2001, 12:37 pm

### Re: News from Outer Space

"Brown, part of the LIGO collaboration at the time, explains this as an attempt to provide a visual aid. “It was hand-tuned for pedagogical purposes.” He says he regrets that the figure wasn’t labelled to point this out."

"This presentation of “hand-tuned” data in a peer-reviewed, scientific report like this is certainly unusual. "

"“It’s problematic: there’s not enough data to do the analysis independently,” says Jackson. “It looks like they’re being open, without being open at all.”"

"Coles himself doesn’t doubt that we have detected gravitational waves, but agrees with Jackson that this cannot be confirmed until independent scientists can check the raw data and the analysis tools. “In the spirit of open science, I think LIGO should release everything needed to reproduce their results.”

Jackson is unconvinced that explanatory papers will ever materialise – the collaboration has promised them before, he says. “This LIGO episode continues to be the most shocking professional experience of my 55 years as a physicist,” he says. Not everyone would agree – but for a discovery of this magnitude, trust is everything."

Grave doubts over LIGO’s discovery of gravitational waves

katastrofa
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### Re: News from Outer Space

bearish
Posts: 5373
Joined: February 3rd, 2011, 2:19 pm

### Re: News from Outer Space

Is that a light absorbing cat?

katastrofa
Posts: 8750
Joined: August 16th, 2007, 5:36 am
Location: Alpha Centauri

### Re: News from Outer Space

Any form of energy, but most preferably heat.

Collector
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### Re: News from Outer Space

Alan
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Joined: December 19th, 2001, 4:01 am
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### Re: News from Outer Space

Congrats to the Chinese.

Meanwhile, NASA just completed a flyby of the most distant object ever visited: NASA's New Horizons Mission Reveals Entirely New Kind of World

The team says that the two spheres likely joined as early as 99 percent of the way back to the formation of the solar system, colliding no faster than two cars in a fender-bender...

Credit: NASA/Johns Hopkins University Applied Physics Laboratory/Southwest Research Institute

In classical and medieval literature,  Ultima Thule (Latin "farthermost Thule") acquired a metaphorical meaning of any distant place located beyond the "borders of the known world"

Who sees the face?

Collector
Posts: 4411
Joined: August 21st, 2001, 12:37 pm

### Re: News from Outer Space

Alan "Who sees the face?"  must she not turn around to show the face?

Alan
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Joined: December 19th, 2001, 4:01 am
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### Re: News from Outer Space

Haha -- well, I see a turtle face: