These are ACS and NICMOS images of the star cluster NGC 346 and surrounding H II region N66 in the SMC. The only emission line is H alpha (f658n). All the other images are broad-band. ACS images range
Triple AGN systems are expected to be the result of the hierarchical model of galaxy formation. Since there are very few of them confirmed as such, we present the results of a new study of the triple-
Small temperate planets are prime targets for exoplanet studies due to their possible similarities with the rocky planets in the Solar System. M dwarfs are promising hosts since...