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Apologies, I’ve been away from computer access for the last few days. Let’s start the week off with some offbeat news.


Source: MIT Museum

A couple of anniversaries to cover this week. The first is the 50th anniversary of the Smoot, a non-standard unit devised by some of the nerds over at MIT.

What exactly is a “Smoot”?

As his fraternity brothers laid his 5-foot, 7-inch frame end-to-end to measure the Massachusetts Avenue bridge one night in October 1958, there was one distinct thought running through Oliver Smoot’s mind.
“It was pretty cold,” he said.

Smoot ‘62 evoked memories recently about the night his name became a unit of measurement as MIT prepares to celebrate the 50th anniversary of the quirky hack. A series of events has been planned for the weekend of Oct. 4.

“Looking at the pictures, I think I had one sweater and I did have on gloves … but basically we all had on windbreakers and you get out in the middle of a bridge and it’s windy,” he said. “Even if the temperature isn’t that low, it’s cold out there.”

In 1958, as a freshman at MIT and Lambda Chi Alpha pledge, the fraternity pledgemaster hatched the idea to use the shortest — and most scientifically named pledge — to measure the bridge from Boston to Cambridge. Little did they know, however, that their activity would make its way into MIT, Boston and even Google lore.

They also underestimated how difficult getting up and down 364.4 times (plus or minus an ear) would be.

The second anniversary celebration to talk about is the 50th anniversary of NASA.

A brief history of NASA can be read here.

The successful launch of the Soviet Union’s first two satellites prompted U.S. President Dwight D. Eisenhower and Congress to put aside their differences and create a lasting national space policy and the institution tasked with carrying it out.

On July 29, 1958, Eisenhower signed the National Aeronautics and Space Act, officially establishing NASA.

Before its creation, the United States did not have a space program per se, according to Eilene Galloway, who helped draft the NASA charter and now serves as honorary director of the International Institute of Space Law. However, separate programs did exist within the U.S. military services, including the Navy’s Vanguard, the Air Force’s Man in Space Program, and the Army’s Jupiter and Juno programs, said Ted Spitzmiller, a space historian and author of “Astronautics: Book 1: Dawn of the Space Age.”

[...]

NASA officially began operating Oct. 1, 1958, using the civilian National Advisory Committee for Aeronautics staff and research facilities as its backbone. Other space research facilities, such as the Army’s Ballistic Missile Agency in Huntsville, Ala., were integrated into the new space agency as well.

The act transferred authority for military space to the Defense Department, and the Advanced Research Projects Agency was created in February 1958 to head military space research.

Also, Brian at Clastic Detritus celebrates his 2nd Blogiversary! Congratulations on two years of posting and here’s to many more!

And I’m going to sneak in one more anniversary — it’s the 50th anniversary of my Dodgers moving to LA from Brooklyn! What better way to celebrate it than potentially winning a World Series this year? ;)

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This post is for the monthly geoblogosphere carnival called the Accretionary Wedge. This month’s Accretionary Wedge is being hosted by Chris Town at Good Schist.


Source: Jet Propulsion Laboratory

Prior to Voyager 1’s flyby of Io in March of 1979, geologists and other scientists back home on Earth had evidence that active volcanism was currently only taking place on our own planet. There was plenty of evidence that volcanism happened on other celestial bodies in the past, such as Olympus Mons on Mars and the large basalt flows on our own Moon.

Voyager 1’s flyby changed that by giving us direct evidence that extraterrestial volcanism was actively happening on other celestial bodies. An engineer at the Jet Propulsion Laboratory in Pasadena, California was analyzing images from the recent flyby of Io and noticed a plume emanating from the surface.


Discovering plumes on Io, taken in March of 1979 by Voyager 1.
Source: NASA, www.nasaimages.org

Since scientists initially discovered those plumes nearly 30 years ago, Io has been the focus of much research and observation. We now know that it is one of the most volcanically active bodies in our solar system, having to deal with the gravitational tug of war subjected on it by Jupiter. The Hawaiian Volcano Observatory has an excellent explanation on why Io is so volcanically active:

Io is situated between Jupiter and two of Jupiter’s large moons - Europa and Ganymede. The gravitational force exerted by Jupiter and its moons creates a tidal bulge more than 100 meters (330 feet) high on Io’s surface. Remember, this is a tide created in the solid rock of Io’s crust! As Io rotates around Jupiter, the tidal bulge moves, Io’s crust is flexed, and tremendous heat is generated - much like the heat generated in a piece of wire when it is quickly bent back and forth. This heat drives the volcanic activity so prevalent on Io.

100 meter tides that move through the solid crust of Io? That is ridiculous!


Active volcanism on Tvashtar, a volcano on Io. Captured by the New Horizons spacecraft in March of 2007.
Source: Jet Propulsion Laboratory

What is all the lava that erupts on Io composed of? Scientists do not know for certain the composition of the lava, but based on spectrometer data, Io’s surface is covered with a mix of hot, basaltic or ultramafic silicates and a sulfur dioxide frost.


Distribution of Sulfur Dioxide Frost on Io
Source: NASA, www.nasaimages.org


Potential Source of Sulfur Flow on Io
Source: NASA, www.nasaimages.org

The low gravity and atmospheric pressure on Io create a perfect recipe for large and spectacular eruptions. Eruption plumes on Io can range from a height of 38 miles to more than 250 miles above the surface of the moon! This is why the plumes are so easy to pick out in photos from the various space probes that have passed the moon.


New Horizons captured this unique view of Jupiter’s moon Io March 1, 2007.
Source: NASA, www.nasaimages.org


Voyager 1 acquired this image of Io on March 4, 1979.
Source: NASA, www.nasaimages.org


Voyager 1 image of Io showing active plume of Loki on limb.
Source: NASA, www.nasaimages.org

The temperature of lava flows and lakes on Io can be as high as 3,000 degrees Fahrenheit. The fall out and deposits from these nearly continuous eruptions rapidly change the surface of Io and the resulting deposits create beautiful mosaics of color.


Pillan Patera - Arizona-sized Io Eruption
Source: NASA and JPL

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Source: JPL - Click to view an animated movie.

The Phoenix Lander has been quite busy on Mars, trying to cram in a bunch of work before the Martian fall, when light levels won’t be strong enough to sustain its operations. NASA released a series of images from Phoenix yesterday that show a dust devil blowing across the horizon.

NASA’s Phoenix Mars Lander has photographed several dust devils dancing across the arctic plain this week and sensed a dip in air pressure as one passed near the lander.

These dust-lofting whirlwinds had been expected in the area, but none had been detected in earlier Phoenix images.

You might remember that one of the Mars Exploration Rovers, Spirit, snapped photos of dust devils in 2005.

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Phoenix landed on the surface of Mars at 4:35pm (PDT) earlier today. The NASA/JPL briefing is happening as I type this.

First photos have been beamed back to Earth!

It will be exciting to see what this little “robot geologist” discovers when they start digging into the Martian soil.

More Information:
Phoenix Mars Mission - Univ. of Arizona
Phoenix Mars Mission - JPL
Phoenix Mars Mission Twitter Page
Mars Exploration Rover Mission

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The fourth episode of the Goodschist PodClast is out today. This episode features Chris Town and myself. Due to technical difficulties, Chris and I decided to each record a separate segment of the PodClast, dealing with topics we were planning on discussing.

Show notes for Episode 4 are available on Chris’ webpage and relevant links will posted on the PodClast del.icio.us account.

Discussions this week feature a brief discussion on the Sichuan earthquake in China and the pending landing of the Mars Phoenix Lander.

Chris is always looking for new voices from the geoblogosphere to join in on the PodClast. If you’d like to participate next time, check out his information on joining the PodClast.

[Via GoodSchist]

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