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http://antwrp.gsfc.nasa.gov/apod/ap070411.html wrote:
Finnegans Wake page 4: "Arms apeal with larms, appalling."
Explanation: Better known as M106, bright spiral galaxy NGC 4258 is about 30 thousand light years across and 21 million light years away toward the northern constellation Canes Venatici. The yellow and red hues in this composite image show the galaxy's sweeping spiral arms as seen in visible and infrared light. But x-ray and radio data (blue and purple) reveal two extra spiral arms -- arms that don't align with the more familiar tracers of stars, gas, and dust. In fact, an analysis of the x-ray and radio data suggests that the anamolous arms are composed of material heated by shock waves. Detected at radio wavelengths, powerful jets originating in the galaxy's core likely drive the shocks into the disk of NGC 4258.
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M106 is located about 7.3 Mpc away.
Hubble expansion constant ~ 74.2 (km/s)/Mpc.
M106 Hubble expansion ~ 542 km/s
M106 is observed to be receeding at 448 ± 3 km/s
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Amateur Image of Messier 106 Showing Possible Companion Spiral NGC 4217 Lower Right Courtesy Hunter Wilson