... Express to Mars . ... Hurtling toward its destination, the high resolution camera on board ESA's Mars Express spacecraft recorded this tantalizing view of the Red Planet earlier this month on December 3rd. ... Most of the time, the apparent motion of Mars in Earth's sky is in one direction, slow but steady in front of the far distant stars. ... Open Star Clusters M35 and NGC 2158 . ... Open clusters may contain from 100 to 10,000 stars, all of which formed at nearly the same time. ... December . ...