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Beautiful island universe M94 lies a mere 15 million light-years distant in the northern constellation of the hunting dogs, Canes Venatici. A popular target for astronomers, the brighter inner part of the face-on spiral galaxy is about 30,000 light-years across. Deep images in the optical range have been interpreted as showing M94's inner spiral region surrounded by a faint, broad ring of stars. But this image at wavelengths from infrared to ultraviolet reveals previously undetected spiral arms sweeping across the outskirts of the galaxy's disk, an outer disk actively engaged in star formation.
Background galaxies are visible through the faint outer arms, while the three spiky foreground stars are in our own Milky Way galaxy.
Below ia a Hubble Space Telescope image of the central part of M94 (7,000 light-years across).