Six planets—Mercury, Mars, Jupiter, Uranus, Neptune, and Saturn—all traveling more or less along the same ecliptic plane around the sun are set to align in the sky over the Earth in late August.
A mini planetary alignment is when any 3 planets appear to line up roughly in a straight line (which is never truly straight) in the sky, while a small planetary alignment is when any 4 planets are involved. What we have in store this month, on August 28, is a large planetary alignment, which consists of any 5 or 6 planets that appear to form up. A great, or full, planetary alignment is when 7 planets (sometimes including Pluto) all form a marvelous procession in the night sky together. So it seems we have a large alignment just up the bend.