In August 2018, 4 planets arc across the evening sky. From west to east as night falls, these bright worlds are Venus, Jupiter, Saturn and Mars. Late August features Mercury before sunrise.
Starting to watch for Perseids now? They're rising in numbers, but - for the moment - the moon is in the way. That means the peak will be glorious - and moon-free - on the mornings of August 11, 12 and 13.
In space, dust comes from comets and exploding stars. It can form planetary rings, drive global weather patterns and even form the seeds of new planets.
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