NASAのインスタグラム(nasa) - 12月21日 06時54分

The Hubble Space Telescope checks out globular cluster Terzan 1, a home for old stars. Lying around 20,000 light-years from us in the constellation of Scorpius (The Scorpion), it is one of about 150 globular clusters belonging to our galaxy, the Milky Way.

Typical globular clusters are collections of around a hundred thousand stars, held together by their mutual gravitational attraction in a spherical shape a few hundred light-years across. They contain some of the oldest stars in a galaxy, hence the reddish colors of the stars in this image — the bright blue ones are foreground stars, not part of the cluster. The ages of the stars in the globular cluster tell us that they were formed during the early stages of galaxy formation! Studying them can also help us to understand how galaxies formed.

Image credit: NASA & ESA, Acknowledgement: Judy Schmidt
#nasa #hubble #stars #universe #astronomy #science

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