An artist's concept is shown in this NASA handout released on March 18, 2013 shows the star V838 Mon. Mon's outer surface suddenly greatly expanded with the result that it became the brightest star in... more 
An artist's concept is shown in this NASA handout released on March 18, 2013 shows the star V838 Mon. Mon's outer surface suddenly greatly expanded with the result that it became the brightest star in the entire Milky Way Galaxy in January 2002. Then, just as suddenly, it faded. A stellar flash like this had never been seen before -- supernovas and novas expel matter out into space. Although the V838 Mon flash appears to expel material into space, what is seen in the above image from the Hubble Space Telescope is actually an outwardly moving light echo of the bright flash. (REUTERS/NASA, ESA/Handout) less 
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Reuters | Photo By REUTERS/NASA, ESA/Handout
Wed, Dec 18, 2013 2:00 PM EST