Posts

December 11, 2014

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12:30 PM | Is Earth’s Water Locally Sourced?
We call Earth a water world, and that’s pretty fair: Our planet’s surface is 70 percent covered in it, it makes up a percentage of our air, and there’s even a substantial amount of it mixed in to the planet’s mantle, deep underground. But where the heck did it come from? This is no idle question. We have a lot of water here, and it must have come from somewhere. There are two obvious sources—it formed here along with the Earth, or it was brought to Earth from […]
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12:00 PM | Week 29: Rolling into Memphis
45s at Stax Records… (All photos by the author). The circle is almost complete. This week sees us pass a crucial milestone, as we begin month seven on the road. We’ve now been continuously traveling longer than ever before, as we surpass our former record set back in 2007 when we completed our six month [...]
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11:27 AM | A proof that the Halting Problem is undecidable
SCOOPING THE LOOP SNOOPER A proof that the Halting Problem is undecidable Geoffrey K. Pullum (School of Philosophy, Psychology and Language Sciences, University of Edinburgh) No general procedure for bug checks will do. Now, I won’t just assert that, I’ll prove it to you. I will prove that although you might work till you drop,… Read more → The post A proof that the Halting Problem is undecidable appeared first on Tuxar.uk.
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11:00 AM | Space Station Laser Link Blasts Broadband Data from Orbit
A new laser link with the International Space Station could do what optical fiber has done for internet access on Earth -- by turning orbital communications from painfully slow dial-up to blazing-fast broadband. Continue reading
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9:33 AM | La protesi sensibile al tatto e al calore
Il dispositivo, presentato sulle pagine di Nature Communications, è rivestito con una nuova pelle sintetica, elastica come quella naturale, e in grado di raccogliere informazioni tattili e termiche da inviare al sistema nervoso
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9:30 AM | Week 29: Rolling into Memphis
45s at Stax Records… (All photos by the author). The circle is almost complete. This week sees us pass a crucial milestone, as we begin month seven on the road. We’ve now been continuously traveling longer than ever before, as we surpass our former record set back in 2007 when we completed our six month [...]
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9:00 AM | Hiding in Plain Out-of-Sight
If you haven’t seen the movie Interstellar, you might not recognize the image above. It’s the black hole that figures prominently in the climax. But even if you have seen the movie, chances are excellent you still don’t know what you’re looking at. I didn’t, anyway, at least the first few days I spent staring at […]
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8:16 AM | La silenziosa scomparsa delle giraffe
Negli ultimi 15 anni il numero di giraffe si è ridotto quasi del 40%, ma senza fare clamore: nella redlist della Iucn sono ancora considerate a basso rischio di estinzione, ma ne rimangono meno di 80.000
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4:00 AM | Come ti scatto la ‘foto’ del secolo
È noto che quasi tutte le galassie contengono nei loro nuclei un buco nero supermassiccio. Questi “mostri galattici” possono raggiungere fino a qualche miliardo di volte la massa del Sole e di solito sono circondati da un disco di accrescimento composto principalmente da gas e polvere. Nel caso della Via Lattea, si ritiene che la … Continue reading Come ti scatto la ‘foto’ del secolo →
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2:33 AM | Does water freeze or boil in space? (Synopsis)
“You can’t cross the sea merely by standing and staring at the water.” -Rabindranath Tagore And you can’t answer a hypothetical question for certain, at least in science, without doing the experiment for yourself. Here on Earth, liquid water is plentiful; our planet has the stable temperatures and pressures that water needs to exist in its…
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2:32 AM | Does water freeze or boil in space?
Here on Earth, it’s liquid all the way. But in space, that’s impossible!Continue reading on Medium »
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1:03 AM | The Lake that Built a Mountain on Mars
NASA’s instrument-laden Curiosity Rover is now at the foot of Mt. Sharp, its ultimate target on Mars. New results from the rover have confirmed and filled in our ideas about what the 3-mile high mountain is doing in the middle of 96-mile wide Gale Crater. And, most important, the new observations give us even more confidence in the notion that ancient Mars was very different from Mars today – it may well have had a much thicker atmosphere, flowing rivers, and occasionally […]

December 10, 2014

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11:15 PM | Newly Found Massive Asteroid Not a Threat to Earth
Claims that Russian scientists have discovered a huge asteroid that could threaten Earth in the near future are just not correct, according to NASA.
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11:00 PM | Patents Are For Everyone.
No, not another child prodigy gets a patent before they could walk.  This story is about a humble actuary.  Bean counters rely heavily on actuarial analysis to conduct their business.  The risks and rewards that come from certain actions can be mathematically shown.  So how did an actuary get a patent?   Jay Vadiveloo, is … Continue reading →
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7:00 PM | Earth's Water Didn't Come from Comets Like Rosetta's
The European mission has discovered that the water locked in Comet 67P/Churyumov-Gerasimenko doesn't match the water on Earth.
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5:11 PM | Global Warming: It’s OK to Be Smart About It
So you know the Earth is warming up—after all, it’s overwhelmingly obvious and the vast majority of climate scientists agree about it. But some people just can’t seem to accept that; in the loudest cases they’re ideologically driven (and/or fossil fuel–funded), but it’s possible that a lot of folks just don’t have the facts.  When you talk to them at a cocktail party (or at family dinners, what with the holidays and all that), things can get ugly […]
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5:00 PM | The Challenge In Finding New Earth-Like Exoplanets.
A couple of things happened this month that may make it easier to find other Earth-like planets. Probably the more important of the two was that for the first time, a ground based telescope has found a super Earth orbiting around 55 Cancri. The Nordic Optical Telescope on the island of La Palma, Spain was … Continue reading →
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4:44 PM | Revisiting Uranus with Voyager 2
Amateur image processor Björn Jónsson brings us some new views of Uranus from reprocessed Voyager 2 data.
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3:15 PM | Acceleratori di particelle da record
Il nuovo record di energia più alta mai raggiunta da degli elettroni è stato stabilito da un team di ricercatori del Berkeley Lab tramite un nuovo acceleratore di particelle laser lungo solo 9 centimetri  
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2:00 PM | SpaceX Will Try to Land Rocket on Floating Ocean Platform
SpaceX will apparently attempt something truly epic during next week's cargo launch to the International Space Station.
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12:49 PM | Samantha Cristoforetti non ha visto nessun Ufo
Lo stupore dell’astronauta durante le fasi di docking alla Stazione spaziale e un misterioso oggetto volante hanno alimentato le speranze degli ufologi. Ma tutto è (facilmente) spiegabile
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12:15 PM | Stormscapes2: Stormier
A couple of months ago I posted an amazing time-lapse video called Stormscapes, showing storms and mesocylcones, created by photographer Nicolaus Wegner. It’s really worth watching; seeing those swirling, dark clouds forming vortices over the Midwest is terrifying and mesmerizing. Wegner contacted me recently; after a year of storm chasing he put together another video, Stormscapes2, and it’s way, way better than the first one. In fact, I’d say it’s seriously one of the […]
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11:14 AM | Istruite ma disilluse. La nuova sessualità delle ragazze
Un'indagine condotta da GfK Eurisko mostra i mutamenti degli stili di vita delle giovani donne dai primi anni ’90 ad oggi
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9:24 AM | The CRomnibus Comes Through for NASA and Planetary Science
The U.S. budget cycle for fiscal year 2015 is coming to an end. Should Congress pass the so-called CRomnibus bill as-is, NASA would see its highest funding level since 2011 and a great increase to its Planetary Science Division.
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9:00 AM | Guest Post: What science can learn from religion
Sharel was twenty when she died from an overdose. Her funeral was held at the Holy Temple Christian Church on Althea Street in Providence, Rhode Island. The church tried to raise $5,000 for the expense, but only managed to raise $347. Althea Street is short, only three blocks long. It is poor. Boarded up buildings […]
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8:17 AM | (Quasi) tutto Einstein in digitale
Parte dei migliaia di documenti scritti da Albert Einstein nel corso della sua vita sono per la prima volta disponibili in digitale. Oltre ai suoi appunti scientifici, anche lettere e documenti privati
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4:00 AM | Materia scura: WIMP o SIMP?
La nostra attuale comprensione sulla composizione dell’Universo è basata sul fatto che la maggior parte della sua massa consiste di materia scura, lo ‘scheletro cosmico’ su cui sono distribuite le galassie e gli ammassi di galassie. Tra le sue proprietà, ricordiamo che la materia scura è fredda, massiccia, non ha colore né carica elettrica e … Continue reading Materia scura: WIMP o SIMP? →
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1:55 AM | 2014’s greatest meteor shower (Synopsis)
“Men of genius are often dull and inert in society; as the blazing meteor, when it descends to earth, is only a stone.” -Henry Wadsworth Longfellow Sure, sure, and they’re not even big, impressive stones. But like any real estate agent will tell you, location is everything. And when your tiny, pebble-sized stone originates from…
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1:55 AM | 2014's greatest meteor shower
This weekend, the Geminids arrive, and promise to be the best meteor shower of the entire year!Continue reading on Medium »

December 09, 2014

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11:45 PM | classic astronomy question
i did a live radio show tonight, welcoming callers to ask any space-related question they wanted. the first caller was an 8 year old girl who asked "are stars made of gas?" (yes.) then she said her brother was with her and wanted to ask a question and was that ok? (sure.) the brother grabbed the phone, took an audible breath, and TOTALLY snuck in "how big is uranus?" LIVE ON AIR! haha! props, kid! what would your answer have been?
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