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Hubble Sees a Dwarf Galaxy Shaped by a Grand Design
The subject of this Hubble image is NGC 5474, a dwarf galaxy located 21
million light-years away in the constellation of Ursa Major (The Great Bear).
This beautiful image was taken with Hubble's Advanced Camera for Surveys
The term "dwarf galaxy" may sound diminutive, but don't let that fool you —
NGC 5474 contains several billion stars! However, when compared to the Milky Way
with its hundreds of billions of stars, NGC 5474 does indeed seem relatively
NGC 5474 itself is part of the Messier 101 Group. The brightest galaxy within
this group is the well-known spiral Pinwheel Galaxy (also known as Messier 101).
This galaxy's prominent, well-defined arms classify it as a "grand design
galaxy," along with other spirals Messier 81 and Messier 74.
Also within this group are Messier 101's galactic neighbors. It is possible
that gravitational interactions with these companion galaxies have had some
influence on providing Messier 101 with its striking shape. Similar interactions
with Messier 101 may have caused the distortions visible in NGC 5474.
Both the Messier 101 Group and our own Local Group reside within the Virgo
Supercluster, making NGC 5474 something of a neighbor in galactic terms.