... Brain Crater on Mars . ... What caused this unusual looking crater floor on Mars? ... Comet NEAT (Q4) Over Indian Cove . ... Comet NEAT (Q4) was quite photogenic earlier this month. Although the head and part of the tails of Comet C/2001 Q4 (NEAT) were visible to the unaided eye, the best views of the colorful tail were revealed only later by cameras able to expose for long periods. NGC 3372: The Great Nebula in Carina . ... Venus: Earths Cloudy Twin . ... Endurance Crater on Mars . ...