Bruce McClure has served as lead writer for EarthSky's popular Tonight pages since 2004. He's a sundial aficionado, whose love for the heavens has taken him to Lake Titicaca in Bolivia and sailing in the North Atlantic, where he earned his celestial navigation certificate through the School of Ocean Sailing and Navigation. He also writes and hosts public astronomy programs and planetarium programs in and around his home in upstate New York.
That’s September 6 at 7:03 UTC. So the crest of the moon’s full phase may have already passed, for you. Still, we all can enjoy this 3rd and final full moon of northern summer (southern winter) tonight.
We’re closest to Neptune for 2017 on September 4. Neptune’s opposition – when it’s 180 degrees from the sun on the sky’s dome – is one day later, on September 5. You need optical aid to spot it. Links to charts here.