Here’s an amazing video of auroras generated by a geomagnetic storm on September 19th, 2011, as seen from the International Space Station:
More information on spaceweather.com.
From /.:
A year ago we took note when Brian May, guitarist for Queen for the last 30 years, submitted his thesis for a Ph.D. in astrophysics. The news now is that the thesis has been published. You, too, can read all about the population of tiny asteroids and space dust that cause the Zodiacal light. The completed thesis appears as the book “A Survey of Radial Velocities in the Zodiacal Dust Cloud” (Springer and Canopus Publishing Ltd., 2008), available at Amazon for $71.96. May was awarded his Ph.D. last summer and accepted a position as chancellor at a British university in November.
Interesting insight into the results of Microsoft’s “Mojave Experiment” on Wil Shipley’s blog…
Microsoft took a bunch of “regular folks” XP users who were afraid of Vista, and told them Microsoft was going to show them a secret new operating system — which was actually Vista.
UNSURPRISINGLY, these people mostly said they liked Vista.
I hate bad science. Hate it. Hate. So let’s look at not one, not two, but FOUR, yes FOUR (ah-ah-ah!) key flaws in this experiment, any single one of which would render its results meaningless:
* The Placebo Effect
* The Pepsi Challenge Effect
* The Perfectly Controlled Environment Effect
* The Personal Tutor EffectMicrosoft has managed to prove that if you have a friendly expert on a controlled machine (with Vista pre-installed) showing a carefully selected subset of Vista features to an ignorant XP user for a few minutes, the XP user will often say he finds Vista acceptable. Wow.
This so-called experiment of Microsoft’s is an insult to science, and to our intelligence. And I am dying to see the out-takes from their shoot. I mean, how many people do you suppose like being told, “Hey, this giant, unpopular monopolistic software company just made an ass out of you! Ha ha! Our leading scienticians just PROVED that you LOVE VISTA and WANT TO MARRY IT. You are TOTALLY GAY for Vista! Haaaaaaa HAAAAAAA!”
Researchers have discovered what causes brilliant outbursts of Northern Lights: Gigantic plasma bullets launched toward Earth by explosions 1/3rd of the way to the Moon.
From NASA’s Science web site:
Duck! Plasma bullets are zinging past Earth.
That’s the conclusion of researchers studying data from NASA’s five THEMIS spacecraft. The gigantic bullets, they say, are launched by explosions 1/3rd of the way to the Moon and when they hit Earth—wow. The impacts spark colorful outbursts of Northern Lights called “substorms.”
“We have discovered what makes the Northern Lights dance,” declares UCLA physicist Vassilis Angelopoulos, principal investigator of the THEMIS mission. The findings appear online in the July 24 issue of Science Express and in print August 14 in the journal Science.
The THEMIS fleet was launched in February 2007 to unravel the mystery of substorms, which have long puzzled observers with their unpredictable eruptions of light and color. The spacecraft wouldn’t merely observe substorms from afar; they would actually plunge into the tempest using onboard sensors to measure particles and fields. Mission scientists hoped this in situ approach would allow them to figure out what caused substorms–and they were right.
The discovery came on what began as a quiet day, Feb 26, 2008. Arctic skies were dark and Earth’s magnetic field was still. High above the planet, the five THEMIS satellites had just arranged themselves in a line down the middle of Earth’s magnetotail—a million kilometer long tail of magnetism pulled into space by the action of the solar wind.
That’s when the explosion occurred.
A little more than midway up the THEMIS line, magnetic fields erupted, “releasing about 1015 Joules of energy,” says Angelopoulos. “For comparison, that’s about as much energy as a magnitude 5 earthquake.”
The blast launched two “plasma bullets,” gigantic clouds of protons and electrons, one toward Earth and one away from Earth. The Earth-directed cloud crashed into the planet below, sparking vivid auroras observed by some 20 THEMIS ground stations in Canada and Alaska. The opposite cloud shot harmlessly into space, and may still be going for all researchers know.
Images by Jeff Hapeman and Karl Johnson via Space Weather’s Aurora Gallery
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