Dust in centre of galaxy NGC 4261

Dust in centre of galaxy NGC 4261

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Caption: Black hole in the core of a galaxy. Hubble Space Telescope (HST) image of a disc of dust and gas circling a black hole in the galaxy NGC 4261. The dust disc is the dark oval shape at centre, and is about 800 light years across. This has a faint spiral form shown by slightly brighter 'arms' within the disc. Spectroscopic measurements reveal that the dust and gas is swirling around a very massive core. The object, about 1.2 billion times the mass of our Sun, is a black hole. This feature was first discovered by the HST in 1992, but can now be studied in more detail following the HST servicing mission of 1994.

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Keywords: active, astronomy, black hole, black hole candidate, core, cosmology, disc, dust, dust disc, galactic, galaxy, galaxy core, hst post-repair, ngc 4261, ngc 4261 core, science

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