APOD: The Not So Quiet Sun (2010 Aug 06)

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APOD: The Not So Quiet Sun (2010 Aug 06)

Post by APOD Robot » Fri Aug 06, 2010 4:12 am

Image The Not So Quiet Sun

Explanation: After a long solar minimum, the Sun is no longer so quiet. On August 1, this extreme ultraviolet snapshot of the Sun from the Solar Dynanimcs Observatory captured a complex burst of activity playing across the Sun's northern hemisphere. The false-color image shows the hot solar plasma at temperatures ranging from 1 to 2 million kelvins. Along with the erupting filaments and prominences, a small(!) solar flare spawned in the active region at the left was accompanied by a coronal mass ejection (CME), a billion-ton cloud of energetic particles headed for planet Earth. Making the 93 million mile trip in only two days, the CME impacted Earth's magnetosphere, triggering a geomagnetic storm and both northern and southern auroral displays.

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orin stepanek
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Re: APOD: The Not So Quiet Sun (2010 Aug 06)

Post by orin stepanek » Fri Aug 06, 2010 4:34 am

So old Sol is active again. :) Don't forget to watch the video and listen to the song. 8-)
Click to play embedded YouTube video.
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Re: APOD: The Not So Quiet Sun (2010 Aug 06)

Post by bystander » Fri Aug 06, 2010 5:57 am


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Re: APOD: The Not So Quiet Sun (2010 Aug 06)

Post by owlice » Fri Aug 06, 2010 6:10 am

Click to play embedded YouTube video.
A closed mouth gathers no foot.

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Re: APOD: The Not So Quiet Sun (2010 Aug 06)

Post by orin stepanek » Fri Aug 06, 2010 12:04 pm

Orin

Smile today; tomorrow's another day!

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Re: APOD: The Not So Quiet Sun (2010 Aug 06)

Post by León » Fri Aug 06, 2010 1:36 pm

In the last mail I received from NASA describes the following phenomenon is the address in Spanish http://ciencia.nasa.gov/headlines/y2010 ... quakes.htm

"Now I know," says David Sibeck, the scientist who is a member of the THEMIS project at the Goddard Space Flight Center. "Plasma jets cause tremors space."

According to the project THEMIS, the jets crash into the geomagnetic field about 30,000 km above the Earth Ecuador. The impact causes a rebound process, in which the plasma actually bounces up and down along the magnetic field that is reverberating. Researchers call it "push repetitive flow." It's like a tennis ball bouncing upward succession of decreasing amplitude are due to energy dissipated in the carpet.

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Re: APOD: The Not So Quiet Sun (2010 Aug 06)

Post by bystander » Fri Aug 06, 2010 2:37 pm

León wrote:"Now we know," says THEMIS project scientist David Sibeck of the Goddard Space Flight Center. "Plasma jets trigger spacequakes."
Communications Center
Science@NASA: Spacequakes Rumble Near Earth
http://asterisk.apod.com/vie ... 31&t=20421

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Re: APOD: The Not So Quiet Sun (2010 Aug 06)

Post by mexhunter » Fri Aug 06, 2010 3:49 pm

Hi to all:
Great Ball of Fire...

http://www.nasa.gov/multimedia/imagegal ... _1732.html

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Re: APOD: The Not So Quiet Sun (2010 Aug 06)

Post by jimsaruff » Fri Aug 06, 2010 4:23 pm

What if the sun really is god? :-)

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Re: APOD: The Not So Quiet Sun (2010 Aug 06)

Post by mexhunter » Fri Aug 06, 2010 4:55 pm

jimsaruff wrote:What if the sun really is god? :-)
Then call it Ra, Aton or Tonatiuh. :mrgreen:
Although Tonatiuh is closer for me and his is represented in Aztec calendar.

http://en.wikipedia.org/wiki/Tonatiuh

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Re: APOD: The Not So Quiet Sun (2010 Aug 06)

Post by biddie67 » Fri Aug 06, 2010 7:05 pm

Interesting collection of links with this APOD description - our sun, even though it has occasional outbursts, so far certainly isn't the drama queen that it might become as it reaches menopause .....

I noticed something that impacted me way back in high school (1955-1959) - in our physics class, we were taught the subject using the centigrade scale - I noticed that the centigrade scale was officially changed to the celsius scale in 1948 by the 9th General Conference on Weights and Measures (CGPM). Shame, shame on my teachers!!!

Also, of interest, when I was listening to the Singing Sun audio, both my dog (asleep by my feet) and my cat (asleep on the table by the laptop) woke up - the cat kept nosing around the speaker on the computer; the dog raised his head, looked at me and kept "wincing" until I stopped the "music" ....