... Planetary Nebula NGC 2818 . ... Several clouds are stacked up into one striking lenticular cloud. ... One memorable vista might be the above 360-degree panoramic image taken by the robotic Spirit rover over the last year. ... An important confirmation that methane exists in the atmosphere of Mars occurred last week, bolstering previous controversial claims made as early as 2003. ... This past weekend, the largest full Moon of 2009 could be seen from almost any clear location on planet Earth at night...