SOLAR SPICULES

Solar activity in the chromosphere takes many forms, the most common feature is the presence of spicules. Spicules are long thin jets of superheated gas, called plasma which appear like the blades of a huge field of fiery grass growing upwards from the photosphere below. On the disc of the Sun, spicules are called chromospheric mottles, there are also horizontal wisps of gas called fibrils, which last about twice as long as spicules.

According to a theory the spicules are caused by sound waves, slight pulsations of the Sun’s visible surface. Seismic waves (similar to those in an earthquake) in the Sun’s interior create giant sound waves called p-modes. The p-modes are normally trapped near the photosphere, but some of the sound waves leak out, developing shock waves that propel matter upward to generate spicules and push them into the corona.

More info:
http://arxiv.org/pdf/0906.1783.pdf

Article:
http://www.astronomy.com/news/2004/07/solar-spicules-explained
http://astroengine.com/category/space-flight/jaxa-space-flight/
Credit: NASA/JAXA/GSFC/SVS

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ROSCOSMOS & NASA HAVE AGREED TO BUILD A NEW SPACE STATION

Roscosmos &  NASA have agreed to build a new space station after the current ISS expires. The operation of the ISS was prolonged until 2024.

“We have agreed that Roscosmos and NASA will be working together on the program of a future space station," Roscosmos chief Igor Komarov said during a news conference on Saturday.

The two agencies will be unifying their standards and systems of manned space programs, according to Komarov. “This is very important to future missions and stations.”

The next goal for the two agencies is a joint mission to Mars, NASA chief Charles Bolden told journalists.

Roscosmos and NASA are working with each other and other partners on a global roadmap of space exploration, Bolden said. “Our area of cooperation will be Mars. We are discussing how best to use the resources, the finance, we are setting time frames and distributing efforts in order to avoid duplication.”

Article:
http://rt.com/news/244797-russia-us-new-space-station/

PROPULSION

For every action there is an equal and opposite re-action.

Gif: Alcohol inside a water cooler bottle strapped to a skateboard is ignited to show propulsion.

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CAN WE EXTINGUISH FIRE WITH SOUND WAVES?

It may seem outlandish, but George Mason University engineering students Seth Robertson and Viet Tran say they’ve developed a way to extinguish fire with sound waves.

How can this be?
Low-frequency sound waves in the 30 to 60 hertz range -- can apparently separate oxygen from fuel,” Tran said, in a GMU news release.
“The pressure wave is going back and forth, and that agitates where the air is. That specific space is enough to keep the fire from reigniting,” Tran told the Washington Post.

Article:
http://www.huffingtonpost.com/2015/03/26/fire-put-out-with-sound-seth-robertson-viet-tran_n_6945192.html?ncid=edlinkushpmg00000030

Reference:
http://www.wusa9.com/story/news/local/2015/03/24/george-mason-students-sound-extinguish-fire/70387578/

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