21 h, may 9, 1664 y - The Great Red Spot on Jupiter's surface is first observed
Description:
"... You have already noticed Jupiter's 'Great Red Spot', which is actually a massive storm. A storm which has been ongoing for what we can assume to be 300 years!"-Daniel Heathers
Added to timeline:
Date:
21 h, may 9, 1664 y
Now
~ 362 years ago