Mercury looms large in this MESSENGER spacecraft image. Expect to see more stunning close-ups this month as the probe returns data from its September 29 flyby.
NASA/JHUAPL/CIWJupiter is the first planet to come into view these autumn evenings. Its diamondlike sparkle pierces the twilight sky shortly after sunset. The giant planet’s neighbors Uranus and Neptune both present excellent targets for observers with binoculars and telescopes throughout October.