Astronomers using NASA’s Hubble Space Telescope have obtained a remarkable new view of a globular cluster called NGC 6535. NGC 6535. Image credit: ESA / Hubble / NASA / Gilles Chapdelaine. Globular clusters (globulus is Latin for small sphere) are tightly bound groups of stars which orbit galaxies. There are about 150 known globular clusters in our Milky Way Galaxy. All of them are estimated to be at least 10 billion years old and therefore contain...
