深空壁纸
by NASA and H. Richer University of British Columbia, credit for ground-based photo: NOAO/AURA/NSF
NASA Image Library · 公有领域（Public Domain）
关于这张图
Peering deep inside a cluster of several hundred thousand stars, NASA Hubble Space Telescope has uncovered the oldest burned-out stars in our Milky Way Galaxy, giving astronomers a fresh reading on the age of the universe.
