Hubble image of globular cluster 47 Tucanae

This new Hubble image captures close-up views of thousands of cluster stars within globular cluster 47 Tucanae. The large bright stars in the image are red giants. These stars have puffed up to several times their normal size because they have exhausted their nuclear fuel and are near the end of their lives. The image was taken by Hubble's Advanced Camera for Surveys.

Astronomers used these Hubble observations along with archival Hubble data of 47 Tucanae to accurately measure the changes in positions of more than 30 000 cluster stars. Based on those measurements, the astronomers pieced together the stars' histories, finding two populations of stars that have different chemical compositions and different motions.

This image was taken between January and October 2010.

Links:

Credit:

NASA, ESA, H. Richer and J. Heyl (University of British Columbia), and J. Anderson and J. Kalirai (STScI)

About the Image

NASA press release
NASA caption
Id:opo1325b
Type:Observation
Release date:19 July 2013, 12:43
Size:959 x 1280 px

About the Object

Name:47 Tuc, 47 Tucanae, NGC 104
Type:• Milky Way : Star : Grouping : Cluster : Globular
• X - Star Clusters Images/Videos
Distance:17000 light years

Colours & filters

BandWavelengthTelescope

V
606 nm Hubble Space Telescope
ACS

I
814 nm Hubble Space Telescope
ACS

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