M82: Galaxy with a Supergalactic Wind
Why is the Cigar Galaxy billowing red smoke? M82 , as this starburst galaxy is also known, was stirred up by a recent pass near large spiral galaxy M81 . This doesn't fully explain the source of the red-glowing outwardly expanding gas and dust, however. Evidence indicates that this gas and dust is being driven out by the combined emerging particle winds of many stars, together creating a galactic superwind . The dust particles are thought to originate in M82's interstellar medium and are actually similar in size to particles in cigar smoke. The featured photographic mosaic highlights a specific color of red light strongly emitted by ionized hydrogen gas, showing detailed filaments of this gas and dust. The filaments extend for over 10,000 light year s. The 12-million light-year distant Cigar Galaxy is the brightest galaxy in the sky in infrared light and can be seen in visible light with a small telescope towards the constellation of the Great Bear ( Ursa Major ). APOD in world languages: Arabic , Bulgarian , Catalan , Chinese (Beijing), Chinese (Taiwan), Croatian , Czech , Dutch , French , German , Hebrew , Indonesian , Japanese , Montenegrin , Polish , Russian , Serbian , Slovenian , Spanish , Taiwanese , Turkish , and Ukrainian