... This sharp color image featuring Mars rock Yogi and the rolling Sojourner robot shows off Yogi's startling two-toned surface. 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. ... The Hydra Cluster of Galaxies . ... 100 | ... April . ...