Hybrid Galaxy Spotted An oddball elliptical galaxy is hiding an inner spiral, astronomers have found. The discovery goes against the norm of most big galaxies, which generally fall into one of two categories: spirals and ellipticals. The nearby galaxy Centaurus A seems to be a bit of both.
Images from Hubble Space Telescope. Star cluster Pismis 24 hangs over the dusty clouds of NGC 6357, a nebula about 8000 light-years away in the constellation Scorpius. This picture showed that the brightest star in the cluster is in fact two stars in a tight binary orbit. Each star is about a hundred times the Sun's mass.