Image of the Day

1 of 16

I Was So Much Older

Credit: ESA/Hubble & NASA; Acknowlegement: Stefano Campani
Monday, July 21, 2014: Globular cluster NGC 121 lies in the constellation of Tucana (The Toucan). Globular clusters consist of old stars organized in big…Read More »

spherical structures that orbit the centers of their galaxies like satellites. NGC 121, discovered in 1835 by English astronomer John Herschel, exists in the Small Magellanic Cloud (SMC), one of our neighboring galaxies. NGC 121 measures around 10 billion years old, making it the oldest cluster in its galaxy. The other globular clusters of the SMC have an age of 8 billion years old or younger. The reason for the age discrepancy has not been discovered yet.

— Tom Chao   Less «
More from