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The globular cluster NGC 6397

The globular cluster NGC 6397


Depicts: Globular cluster NGC 6397
Copyright: European Space Agency & Francesco Ferraro (Bologna Astronomical Observatory)

This ESA/NASA Hubble Space Telescope Wide Field Planetary Camera 2 image shows the globular cluster NGC 6397 in the constellation Ara (the Altar). It is composed of six exposures through different filters: violet/indigo (Strvmgren u, 345 nm, 15080 seconds), blue (B, 418 nm, 8580 seconds), dark green (V, 515 nm, 978 seconds), light green (H-alpha, 656 nm, 24180 seconds), red-orange (R, 678 nm, 1538 seconds), and red (I, 839 nm, 978 seconds). The cluster is home to a highly unusual system consisting of a fast spinning pulsar and a bloated red companion star.
Last Update: 1 September 2019
25-Sep-2022 18:26 UT

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