Jupiter's Great Red Spot (GRS) is shrinking
• comparison image between Pioneer’s visit(s) and a more recent ground-based image - http://www.unmannedspaceflight.com/index.php?act=attach&type=post&id=21649
• HST images - http://hubblesite.org/image/3368/news/20-jupiter
• animation of GRS shrunk another 20% or so - http://spaceweather.com/archive.php?view=1&day=08&month=06&year=2019
• Christopher Go - http://astro.christone.net/jupiter/
• Anthony Wesley (see 2019 Apr) - http://www.acquerra.com.au/astro/gallery/jupiter/
• Damian Peach (2019) - http://www.damianpeach.com/jupiter.htm