Sunny Priyan
This ancient stellar jewelry box, a globular cluster called NGC 6397, glitters with the light from hundreds of thousands of stars.
Image Credit: ESA/Hubble & NASA
Astronomers used the Hubble Space Telescope to gauge the cluster's distance at 7,800 light-years away. NGC 6397 is one of the closest globular clusters to Earth.
Image Credit: ESA/Hubble & NASA
The cluster's blue stars are near the end of their lives. These stars have used up their hydrogen fuel that makes them shine.
Image Credit: Pexels
They are converting helium to energy in their cores, which fuses at a higher temperature, resulting in a blue colour.
Image Credit: Pixabay
The reddish glow is from red giant stars that have consumed their hydrogen fuel and have expanded in size.
Image Credit: ESA/Hubble & NASA
NGC 1805 is unusual as it appears to host two different populations of stars with ages millions of years apart.
Image Credit: ESA/Hubble & NASA