Understanding Globular Clusters; Gravitational Bonds of Cosmic Spheres
The term " clusters" pertains to densely packed groups of stars that are spherical in shape and held together by the force of gravity. Due to their structure these clusters prominently exhibit a higher concentration of stars at their cores emphasizing their spherical morphology.
The Hidden Treasures of Our Galaxy; Globular Clusters in the Milky Way
Our home galaxy the Milky Way harbors around 150 known globular clusters. However astronomers speculate that there may be more concealed behind the galaxys disk. In galaxies like ours these clusters form an integral part of what is referred to as the galactic halo—indicating their specific location within the galaxy.
Distinctive Characteristics of NGC 6717; A Cluster Enriched with Abundant Metals
Globular clusters typically consist of stars with low metal content. However NGC 6717 stands out due to its collection of stars, with high metal content.
Adding to its intrigue there is a discovery at the center of this cluster. A star known as an RR Lyrae variable. This finding intensifies the fascination surrounding NGC 6717.
The captivating composite image of NGC 6717 taken by the Hubble Space Telescope provides a representation of this remarkable celestial object. The image was created using filters that capture various wavelengths; 275 nm (UV, purple) 336 nm (U band blue) 438 nm (B band azure) 606 nm (V band green) and 814 nm (I band red). By examining the image you can differentiate between the stars in the foreground and those belonging to NGC 6717 based on their distinct cross like diffraction spikes.
Credit, for the image goes to ESA/Hubble and NASAs A. Sarajedini
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