Globular Cluster 15 and Planetary Nebula Pease 1. Globular clusters contain hundreds of thousands of stars that are tightly gravitationally bound in a sphere. These spheres are usually more than 100 light-years in diameter. Globular clusters usually orbit a galaxy in a halo around it. | |
Licence : | Droits gérés |
Crédit: | Science Photo Library / Lodriguss, Gerard |
Taille de l’image : | 3824 px × 2550 px |
Model Release : | Non requis |
Property Release : | Non requis |
Restrictions : | - |