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From: Stan6/16/2012 4:34:57 PM
   of 1182
 
Salman Khan explains how Cepheid Variables work.


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To: Stan who wrote (1172)6/18/2012 1:02:30 AM
From: SofaSpud   of 1182
 
Thank you for posting that -- I'd always wondered!

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To: SofaSpud who wrote (1173)6/18/2012 9:49:42 AM
From: Stan   of 1182
 
You're welcome. I enjoy Salman's videos. He has what's called Khanacademy, a non-profit educational service covering a wide range of topics. Salman has made well over 3000 videos like this himself and hosts other videos on various topics too, making a current total of over 5000. He wants to make knowledge and learning free. I am a subscriber (it's free) and have viewed over 100 of them so far.

Stan

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From: Stan6/18/2012 10:18:39 PM
   of 1182
 
Strange nanoparticles found in meteorite-created glass beads on the moon.

The Moon's Peculiar Dust Gets More Peculiar Still


By JEFFREY KLUGER | Time.com – 15 hrs ago

The moon has never had all that much. It doesn't have atmosphere, it doesn't have water and it sure doesn't have life. What it does have though is dirt -- lots and lots of dirt -- and it's some of the coolest stuff you ever saw. Now it's gotten cooler still, thanks to the discovery this week of a wholly unexpected ingredient stirred into the lunar mix.

Even before astronauts landed on the moon, they knew the soil would be something special. With no atmosphere to intercept incoming meteorites and micrometeorites, the lunar regolith -- or surface covering -- would have been subjected to a 4.5 billion year bombardment that would have produced a layer of dust far finer than confectioner's sugar. That dust, the Apollo crewmen found when they went out to play in it, did some strange things: it rose above the surface when disturbed and hung there far longer than could be explained by the moon's weak gravity; it crept deep into the weave and cracks of virtually anything it touched and clung there as if adhesively attached. What's more, it was filled with exquisitely fine green and orange glass beads -- the products of the superheated melting and cooling that followed impacts"

more. . . news.yahoo.com 


It does have some water though,

time.com 

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To: Stan who wrote (1175)7/8/2012 11:20:48 AM
From: longnshort2 Recommendations   of 1182
 
'The next best thing to being there': NASA releases the most spectacular picture of Mars ever taken... in all its 360-degree glory

Read more: dailymail.co.uk 

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To: longnshort who wrote (1176)7/8/2012 4:50:37 PM
From: Stan   of 1182
 
Fascinating, as Spock would say. I downloaded the TIFF, over a half a gig, but it's worth the space (sorry, no pun intended). Thanks for that link. The ones that made the rover must be proud.

I bet it would freak out anyone who went there not to see a blue sky - among other things. . .

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To: Stan who wrote (1177)7/12/2012 11:05:41 AM
From: longnshort   of 1182
 



What about this.....the time continuum is about to be altered for the first time in about 20 minutes<g>

h/t jeff

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To: longnshort who wrote (1178)7/12/2012 11:43:52 AM
From: Stan   of 1182
 
Missed it! But, I did notice a few things starting to fade.

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From: Stan8/10/2012 4:42:08 PM
   of 1182
 
Perseid showers Saturday and Sunday evenings in NE sky after sunset.

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From: Stan11/20/2012 9:34:26 PM
   of 1182
 
I hope they have some sort of galactic welfare, or at least it does not come to our neighborhood.

Astronomers find 'homeless' planet wandering through space



(Phys.org)—A planet that is not orbiting a star, effectively making it homeless, has been discovered by a team of University of Montreal (UdeM) researchers working with European colleagues and data provided by the Canada-France-Hawaii Telescope (CFHT) and the European Southern Observatory's Very Large Telescope (VLT). "

Read more at: phys.org 

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