Media Information

 
 
 
Collection:
NASA Astronomy Picture of the Day Collection
Title:
M13: The Great Globular Cluster in Hercules
Explanation:
M13 [ http://www.seds.org…] is one of the most prominent and best known globular clusters [ http://antwrp.gsfc.…]. Visible with binoculars in the constellation of Hercules [ http://www.astro.wi…], M13 is frequently one of the first steps beyond the ordinary visible to the casual sky gazer. M13 [ http://www.concentr…] is a colossal home to over 100,000 stars, spans over 150 light years across, lies over 20,000 light years distant, and is over 12 billion years old. At the 1974 dedication of Arecibo Observatory [ http://antwrp.gsfc.…], a radio message [ http://antwrp.gsfc.…] about Earth was sent in the direction of M13 [ http://www.kbcc.cun…]. The reason for the low abundance of unusual blue straggler stars [ http://antwrp.gsfc.…] in M13 is currently unknown [ http://adsabs.harva…].
Credit and Copyright:
Michael Richmann [ mailto:richmann@conc entric.net ]
keyword:
Messier object
keyword:
globular cluster
facet_where:
Goddard Space Flight Center (GSFC)
facet_what:
Earth
facet_what:
Hercules
facet_what:
globular cluster
original url:
UID:
SPD-APOD-ap980819

M13: The Great Globular Cluster in Hercules