[M102]

[NGC 5866 (M102), HST]

Hubble Sees Galaxy on Edge: M102 (NGC 5866)

This is a unique view of the disk galaxy M102 (NGC 5866) tilted nearly edge-on to our line-of-sight. Hubble's sharp vision reveals a crisp dust lane dividing the galaxy into two halves. The image highlights the galaxy's structure: a subtle, reddish bulge surrounding a bright nucleus, a blue disk of stars running parallel to the dust lane, and a transparent outer halo. NGC 5866 is a disk galaxy of type "S0" (pronounced s-zero). Viewed face on, it would look like a smooth, flat disk with little spiral structure. It remains in the spiral category because of the flatness of the main disk of stars as opposed to the more spherically rotund (or ellipsoidal) class of galaxies called "ellipticals." Such S0 galaxies, with disks like spirals and large bulges like ellipticals, are called 'lenticular' galaxies. NGC 5866 lies in the Northern constellation Draco, at a distance of 44 million light-years. It has a diameter of roughly 60,000 light-years only two-thirds the diameter of the Milky Way, although its mass is similar to our galaxy. This Hubble image of NGC 5866 is a combination of blue, green and red observations taken with the Advanced Camera for Surveys in February 2006.

Credit: Bill Keel (University of Alabama, Tuscaloosa), NASA, ESA, and The Hubble Heritage Team (STScI/AURA)

  • Original STScI Press Release (StSci 2006-24, June 8, 2006)

  • More images of NGC 5866/M102
  • Amateur images of NGC 5866/M102

    Hartmut Frommert
    Christine Kronberg
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    Last Modification: June 9, 2006