Astrophysicist Steinn Sigurdsson of Pennsylvania State University, University Park, thinks one scenario advanced in the papers is likely: that gas from a third star, now ejected from the system, spun up the pulsar long ago in the globular cluster's crowded core. (sciencemag.org)
Starting in 1914, American astronomer Harlow Shapley exploited the Cepheids to derive the overall shape of the Milky Way, and to show that we are in the outskirts of our galaxy, far from the crowded core of stars at the center. (discovermagazine.com)
The closest globular cluster to Earth is still several thousand light - years away, making it difficult to find planets, particularly in a cluster's crowded core. (sciencedaily.com)