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Arată versiune întreagă : Descopera Cosmosul !



latan.elena
25.08.2014, 17:13
Discover the cosmos! (http://apod.nasa.gov/apod/archivepix.html)




Astronomy Picture of the DayDiscover the cosmos! (http://apod.nasa.gov/apod/archivepix.html) Each day a different image or photograph of our fascinating universe is featured, along with a brief explanation written by a professional astronomer.
2014 August 9
http://apod.nasa.gov/apod/image/1408/BioluminescenceMW_PhilHart1024.jpg (http://apod.nasa.gov/apod/image/1408/BioluminescenceMW_PhilHart.jpg)
A Luminous Night
Image Credit & Copyright (http://apod.nasa.gov/apod/lib/about_apod.html#srapply): Phil Hart (http://philhart.com/blogs/phil)Explanation: What shines in the world at night (http://www.twanight.org/newTWAN/news.asp?newsID=6097)? Just visible to the eye, a rare electric blue glow spread along the shores of Victoria Lake on January 16, 2013. Against reflections of a light near the horizon, this digitally stacked long exposure recorded the bioluminescence (http://philhart.com/content/bioluminescence-gippsland-lakes-again) of Noctiluca scintillans (http://www.imas.utas.edu.au/zooplankton/image-key/noctiluca-scintillans), plankton stimulated by the lapping waves. Above, the night skies of the Gippsland Lakes region, Victoria, Australia shine with a fainter greenish airglow. Oxygen atoms in the upper atmosphere, initially excited by ultraviolet sunlight, produce the more widely seen fading atmospheric chemiluminescence (http://www.atoptics.co.uk/highsky/airglow2.htm). Washed out by the Earth's rotation, the faint band of the southern summer Milky Way stretches from the horizon as star trails circle the South Celestial Pole.
Watch: Meteors vs. Supermoon (http://science.nasa.gov/science-news/science-at-nasa/2014/28jul_perseids2014/)
Tomorrow's picture: meteor below (http://apod.nasa.gov/apod/ap140810.html)< (http://apod.nasa.gov/apod/ap140808.html) | Archive (http://apod.nasa.gov/apod/archivepix.html) | Index (http://apod.nasa.gov/apod/lib/aptree.html) | Search (http://antwrp.gsfc.nasa.gov/cgi-bin/apod/apod_search) | Calendar (http://apod.nasa.gov/apod/calendar/allyears.html) | RSS (http://apod.nasa.gov/apod.rss) | Education (http://apod.nasa.gov/apod/lib/edlinks.html) | About APOD (http://apod.nasa.gov/apod/lib/about_apod.html) | Discuss (http://asterisk.apod.com/discuss_apod.php?date=140809) | > (http://apod.nasa.gov/apod/ap140810.html)Authors & editors: Robert Nemiroff (http://www.phy.mtu.edu/faculty/Nemiroff.html) (MTU (http://www.phy.mtu.edu/)) & Jerry Bonnell (http://antwrp.gsfc.nasa.gov/htmltest/jbonnell/www/bonnell.html) (UMCP (http://www.astro.umd.edu/))
NASA Official: Phillip Newman Specific rights apply (http://apod.nasa.gov/apod/lib/about_apod.html#srapply).
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A service of: ASD (http://astrophysics.gsfc.nasa.gov/) at NASA (http://www.nasa.gov/) / GSFC (http://www.nasa.gov/centers/goddard/)

& Michigan Tech. U. (http://www.mtu.edu/)
http://apod.nasa.gov/apod/apod.gifAstronomy Picture of the Day Archive
http://apod.nasa.gov/apod/archivepix.html