Sunny Priyan
The cluster is located some 28,000 light-years away in the constellation Sagittarius, the archer.
Image Credit: NASA, ESA
They hold hundreds of thousands to millions of stars that average about one light-year apart, but they can be as close together as the size of our solar system.
Image Credit: NASA, ESA
The data used to create this image came from five different Hubble observing programs, four of which focused on the properties of pulsars.
Image Credit: NASA, ESA
Pulsars are highly magnetized, rotating neutron stars emitting a beam of electromagnetic radiation from its magnetic poles.
Image Credit: NASA, ESA
Astronomers have clocked pulsars spinning at over 716 rotations per second, though theoretically they could reach 1,500 before losing energy or breaking apart.
Image Credit: NASA, ESA
Globular clusters like NGC 6440 are roughly spherical, tightly packed, collections of stars that live on the outskirts of galaxies.
Image Credit: NASA, ESA