The only evening planet for July is Mars, faint red in the west at dusk, and getting lost in the Sun’s glare by August. High ...

In this episode, Astronomy magazine Editor Dave Eicher invites you to head out sometime soon and observe the great globular cluster M22 in the constellation Sagittarius the Archer. From a dark site on ...

Using the Magellan Telescopes at Las Campanas Observatory in Chile, astronomers have performed a chemical study of a globular ...

NGC 6355 has been imaged using NASA's Hubble Space Telescope. The globular cluster of stars lies 50,000 light-years away.

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. This star-studded ...

Globular clusters are of particular interest to astrophysicists, as they can be 12 to 13 billion years old, which means they were some of the first structures that formed in the early universe.

And second, although stars in a cluster are closer together than out in the field (i.e., not in a cluster), the average distance between two stars in a globular cluster is still about 1 light-year.

Astronomers spotted the most distant globular clusters ever discovered, and they’re in a 9-billion-year-old galaxy pictured in Webb's First Deep Field.

Globular clusters are an ancient relic of the Early Universe. During this period of time just after the Big Bang, the universe was a “hot soup of particles” or protons, neutrons, and electrons.

Modern astronomy holds that all major galaxies (with the Milky Way as no exception) are the accumulation of numerous small mergers. Thus, it should be expected that some of the globular clusters ...

The globular cluster Terzan 12 lies 15,000 light-years from Earth. It is nestled deep in the Milky Way, in the constellation of Sagittarius. Its aging stars appear bright red due to the clouds of ...