RocketSTEM Issue #11 - April 2015 | Page 123

A galaxy 71. on the edge The bright streak slicing across the frame of this spectacular image is an edge-on view of galaxy NGC 4762, and a number of other distant galaxies can be seen scattered in the background. Previously thought to be a barred spiral galaxy, NGC 4762 has since been found to be a lenticular galaxy, a kind of intermediate step between an elliptical and a spiral. The edge-on view that we have of this particular galaxy makes it difficult to determine its true shape. The galaxy’s disc is asymmetric and warped, which could potentially be explained by NGC 4762 violently cannibalising a smaller galaxy in the past. The remains of this former companion may then have settled within NGC 4762’s disc, redistributing the gas and stars and so changing the disc’s morphology. Credit: ESA/Hubble & NASA