APRIL 25, 2006
M82: Galaxy with a Supergalactic Wind
EXPLANATION
What’s lighting up the Cigar Galaxy? M82, as this irregular 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, however. Recent evidence indicates that this gas is being driven out by the combined emerging particle winds of many stars, together creating a galactic "superwind." The above photographic mosaic, released yesterday to commemorate the sixteenth anniversary of the Hubble Space Telescope, highlights a specific color of red light strongly emitted by ionized hydrogen gas, showing detailed filaments of this gas. The filaments extend for over 10,000 light years. 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 Ursa Major.
Credit
NASA,
ESA,
The Hubble Heritage Team,
(STScI /
AURA)
Acknowledgement:
M. Mountain
(STScI),
P. Puxley
(NSF),
J. Gallagher
(U. Wisconsin)
