Scientists who study Neptune don't know why it did that.īut there's more: There are two other mysterious events seen associated with this storm. It's huge, over 7,000 kilometers wide - the entire continental United States could easily fit inside it - and it was seen to be moving south… but then observations taken in January 2020 showed that this southern migration had reversed itself, and the storm was moving north again.
Hubble spied a dark storm in Neptune's northern hemisphere in September 2018. Fry (University of Wisconsin-Madison)īut not this time. Wong (University of California, Berkeley) and L.A. The colored numbers represent Hubble filters used to make this three-color image.
A Hubble image taken in January 2020 (left annotated on right) shows a large dark spot on Neptune and a smaller one that may have spun off of it.
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