Sunny Priyan
This star-studded image from the Hubble Space Telescope shows the heart of the globular cluster NGC 6638 in the constellation Sagittarius.
Credit: ESA/Hubble & NASA, R. Cohen
The star-strewn observation highlights the density of stars at the heart of globular clusters.
Image Credit: Pixabay
These are dense, stable, and tightly bound clusters of tens of thousands to millions of stars.
Image Credit: Pixabay
Hubble revolutionized the study of globular clusters, since it is almost impossible to clearly distinguish the stars in globular clusters with ground-based telescopes.
Image Credit: Pixabay
The blurring caused by Earth’s atmosphere makes it impossible to tell one star from another, but from Hubble’s location in low-Earth orbit the atmosphere no longer poses a problem.
Image Credit: Pixabay
Hubble has been used to study what kind of stars globular clusters are made up of, how they evolve, and the role of gravity in these dense systems.
Credit: ESA/Hubble & NASA, R. Cohen