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Астронет: Астрономическая картинка дня M13: огромное шаровое скопление в Геркулесе http://variable-stars.ru/db/msg/1163429/eng |
Credit & Copyright: Michael Richmann
Explanation:
M13
is one of the most prominent and best known
globular clusters.
Visible with binoculars in the constellation of Hercules, M13 is frequently one of the first
steps beyond the ordinary visible to the casual sky gazer.
M13 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, a
radio message
about Earth was sent in the direction of
M13.
The reason for the low abundance of unusual
blue straggler stars
in M13 is currently unknown.
Authors & editors:
Robert Nemiroff
(MTU) &
Jerry Bonnell
(USRA)
NASA Web Site Statements, Warnings,
and Disclaimers
NASA Official: Jay Norris.
Specific
rights apply.
A service of:
LHEA at
NASA /
GSFC
& Michigan Tech. U.