The galaxy itself is a 14,000 light year in diameter irregular dwarf. It holds about one-tenth of the mass of our own Milky Way. A central bar of stars show prominently in its structure, as well as a single spiral arm. The galaxy is considered a treasure trove of celestial phenomena to astronomers, with 60 [[globular cluster|globular clusters]], 400 [[planetary nebula]], and 700 [[open cluster|open clusters]] identified thus far, along with hundreds of thousands of stars including many [[supergiant|supergiants]].<ref>Burnham, Robert, Jr. (1978). Burnham's Celestial Handbook: Volume Two. New York: Dover. p. 840-47. ISBN 048623567X.</ref> | The galaxy itself is a 14,000 light year in diameter irregular dwarf. It holds about one-tenth of the mass of our own Milky Way. A central bar of stars show prominently in its structure, as well as a single spiral arm. The galaxy is considered a treasure trove of celestial phenomena to astronomers, with 60 [[globular cluster|globular clusters]], 400 [[planetary nebula]], and 700 [[open cluster|open clusters]] identified thus far, along with hundreds of thousands of stars including many [[supergiant|supergiants]].<ref>Burnham, Robert, Jr. (1978). Burnham's Celestial Handbook: Volume Two. New York: Dover. p. 840-47. ISBN 048623567X.</ref> |