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Extensively studied in the literature and one of the oldest known among deep sky objects is NGC 6752.
It is a crowded globular cluster, filled with hundreds of thousands of stars and has its location approximately 13,000 light-years from Earth,
in the Pavo constellation.
This large, bright globular cluster is estimated to be over 10 billion years old and has been glowing for well over twice as long as our solar system has existed.
This image presents the globular cluster NGC 6752 ; stars for which spectra were obtained in the present programme are marked by
small circles (only visible in the high-resolution version of this photo). NGC 6752 is a typical globular cluster, containing many
hundreds of thousands of stars, of which some tens of thousands are visible in this photo.
The bright, round object to the lower right of the cluster is the overexposed image of the 7th magnitude star HD 177999. Ctredits: ESO
NGC 6752 is far beyond our reach, but the Hubble Space Telescope delivers clear and accurate images of NGC 6752.
NGC 6752 globular cluster. Credits: NASA/Hubble
NGC 6752 contains a high number of "blue straggler'' stars, some of which are visible in this image.
"Blue Stragglers" are unusually hot and bright stars found in the cores of ancient star clusters and their origin seems to be something of a mystery.
These stars display characteristics of stars younger than their neighbors, despite models suggesting that most of the stars within
globular clusters should have formed at approximately the same time.
Studies of NGC 6752 may shed light on this situation. It appears that a very high number (up to 38 percent) of the stars within its core region are binary systems.
Collisions between stars in this turbulent area could produce the "blue stragglers".
The globular clusters like NGC 6752, contain some of the Milky Way's oldest stars.
They are distributed within a spherical halo around the galaxy, in contrast with open clusters, which are found only in the disc, and
seem to move in highly elliptical orbits around the center of the Milky Way.
Globular cluster NGC 6752 - Credit: ESO
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MessageToEagle.com -
Extensively studied in the literature and one of the oldest known among deep sky objects is NGC 6752.
The 3C294, is one of the most distant galaxies recorded by Chandra, the most sophisticated X-ray observatory ever built.
The cluster 3C294 is even 40 percent farther (!) than the next most distant x-ray galaxy cluster.
Chandra focus on X-rays from high-energy regions of the Universe and see the invisible.
It is so sensitive that it can capture images of particles as they disappear into a black hole deep in outer space.
