Astronomers classify galaxies into three major categories: elliptical, spiral and irregular. Quasars are compact areas in the center of a galaxy. Orbiting this behemoth is another massive black hole. But while the LMC is about 180,000 light-years away and is a well known satellite of our own Milky Way Galaxy, NGC 55 is more like 6 million light-years distant and is a member of the Sculptor Galaxy Group. A galaxy may be made up of two visible components. When observing galaxies you will notice Magellanic clouds or (nubeculae Magellani) which are two dwarf. The SMC, also an irregular galaxy, may be a distorted barred disk, deformed by the tidal forces of Milky Way and LMC. It may look like sparse cloud, but it is in fact full of. Although there is nothing typical, symmetrical, or ordinary about irregular galaxies, there are two distinct types: IrrI. NGC 541 Fuels an Irregular Galaxy in New Hubble Image This striking pair is an elliptical galaxy NGC 541 and an unusual star-forming, irregular dwarf galaxy known as Minkowski's Object (the bluish object to the lower left of NGC 541). They are among the smallest galaxies and are full of gas and dust. A irregular galaxy it is a conglomeration of stars, planets, gas, dust, and matter that, although held together by the force of gravity, visually lacks organization. A new type of galaxy was discovered recently, called a "starburst" galaxy. The LMC is full of interesting objects including diffuse nebulae, globular and open clusters, planetary nebulae, and more. The term galaxy derives itself from the Greek word galaxias, meaning "milky". This superbly detailed view reveals M81's bright yellow nucleus, blue spiral arms, and sweeping cosmic dust lanes with a scale comparable to the Milky Way.
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