This star-studded picture from the NASA/ESA Hubble Room Telescope shows the heart of the globular cluster NGC 6638 in the constellation Sagittarius.
The star-strewn observation highlights the particular density of stars in the middle of globular clusters, that are stable, tightly bound groups of tens of thousands to millions of superstars.
In order to capture the data in this picture, Hubble used two of its cutting-edge astronomical instruments: Broad Field Camera 3 and the Advanced Camera for Surveys.
Hubble revolutionized the study of globular groupings.
The distortion caused by Earth’s atmosphere makes it nearly impossible to clearly distinguish stars in the cores of globular clusters with ground-based telescopes.
Orbiting some 340 miles (550 km) over Earth, Hubble can study what kind of stars make up globular clusters, how they evolve, and the role of gravity in these dense systems without Globe’s atmosphere posing a problem.
The NASA/ESA/CSA Wayne Webb Space Telescope may further our understanding of globular clusters by peering into their star-studded interiors.
Webb observes at infrared wavelengths , providing unique information about bunch stars that will complement Hubble’s incredible views.