... The IceCube Neutrino Observatory near the South Pole of the Earth has begun to detect nearly invisible particles of very high energy. ... M31: The Andromeda Galaxy . ... Andromeda. ... The diffuse light from Andromeda is caused by the hundreds of billions of stars that compose it. ... Is this coat hanger a star cluster or an asterism? ... Many of the brightest blue images are of a single, unusual, beaded, blue, ring-like galaxy which just happens to line-up behind a giant cluster of galaxies. ...