Astronomy Picture of the Day

Globular Star Cluster M3

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#101606 by @ 10.06.2007 00:00 - nach oben -
Globular Star Cluster M3


This immense ball of half a million stars older than the Sun lies
over 30,000 light-years away.

Cataloged as M3
(and NGC 5272),
it is one of about 150
globular star
that roam the halo of our
Way Galaxy

Even in this
sharp image
, individual stars are difficult to distinguished in the
packed core, but colors are apparent for the bright stars on the
cluster's outskirts.

M3's many cool "red" giant stars take on a yellowish cast,
while hotter giants and pulsating
variable stars look light blue.

A closer look
at the deep telescopic view also reveals a host
of background galaxies.

Itself about 200 light-years across, the giant star cluster is
a relatively bright, easy target for binoculars
in the northern constellation Canes Venatici,
Hunting Dogs
, and not far from

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