... These three bright nebulae are often featured in telescopic tours of the constellation Sagittarius and the crowded starfields of the central Milky Way. ... This striking, otherworldy scene really is a view from planet Earth. ... What type of cloud is that? ... To find out, a team of astronomers estimated the relative distances to over 5,000 galaxies in one of the most distant fields of galaxies ever imaged: the Hubble Ultra Deep Field (HUDF). Bright Planetary Nebula NGC 7027 from Hubble . ...