No, a Planetary Alignment on Jan. 4, 2015 Won't Decrease Gravity

[Note: The very first nonsense I had to debunk in 2014 was a claim that on January 4 of that year a planetary alignment would cause gravity to decrease, allowing you to float momentarily or fall more slowly if you jumped in the air at the right moment: "Zero G Day". This exact same hoax has resurfaced this week in a couple of places, so I've decided to update the debunking to include some new links and repost it, hopefully to stem the tide of silliness at year's end. It seems fitting that (hopef...