... Yogi appears to be leaning into the prevailing winds causing some to suggest that its color contrast may be caused by the accumulation of rust colored dust on its windward face. ... Mira A is a red giant star undergoing dramatic pulsations, causing it to become more than 100 times brighter over the course of a year. ... These ice chips were shed from Comet Swift-Tuttle. ... Dubbed NGC 6589 and NGC 6590, the colors of this nebulosity, are caused by gas and dust. ... The Hydra Cluster of Galaxies . ...