atoms excited by these collisions emit light as they return to their original energy level, creating the visible aurora. The most commonly observed color of aurora is green, caused by light emitted by excited oxygen atoms," according to Melissa Dawson and William Stefanov at NASA's Johnson Space Center.
Date: Sep 20, 2011
Category: Sci/Tech
Source: Google
Youtube
Melissa Dawson-Bowling - Supposedly
This is Melissa again - the song's called 'Supposedly' and it's beauti...
Category:
Music
Uploaded:
24 Jul, 2010
Duration:
3m 43s
Utah Chamber Artists sing Stanford's "The Blu...
The choir rehearses Charles Stanford's "The Bluebird" in the Thompson ...
Category:
Music
Uploaded:
13 Sep, 2010
Duration:
3m 51s
The Great Mouse Detective - Let Me Be Good to...
From a famous english book of Basil of Bakerstreet. Hope this song is ...
Category:
Entertainment
Uploaded:
03 Jul, 2010
Duration:
2m 53s
Jan Helfeld - Professional Congressional Debu...
Melissa Dawson interviews Jan Helfeld from www.janhelfeld.c... to dis...
Category:
Nonprofits & Activism
Uploaded:
02 Apr, 2009
Duration:
6m 56s
A Minority Viewpoint with Libertarian Jabriel...
Jabriel Ballentine abandons the DC Republican Party to pursue libertar...