Great Red Spot Smallest Measured Size
Hubble measurements show Jupiter's Great Red Spot has shrunk to its smallest size then recorded.
Role range: 1969-
Historical biography archive · Updated 2026-11-03
Amy Simon Biography and Timeline
Follow Amy Simon through 7 dated historical records for United States of America.
Amy Simon, historical timeline
A chronological timeline drawn from matching World History Database records.
7Distinct records
1 of 1Page
2014–2023Years on this page
2014
OPAL Jupiter Monitoring Begins
Begins long-term Hubble monitoring of Jupiter through the Outer Planet Atmospheres Legacy program.
Role range: 1969-
2015
Neptune OPAL Monitoring
The Hubble Outer Planet Atmospheres Legacy programme begins annual global monitoring of Neptune's changing weather.
2016
Neptune Storm Precursors
Simon and colleagues identify increased cloud activity that precedes the appearance of a later large Neptune dark storm.
2018
New Neptune Dark Storm
Hubble detects a large new dark storm in Neptune's northern hemisphere.
2020
Neptune Dark Storm Reversal
Hubble observations show a large Neptune dark vortex reversing its southward drift and moving back northward.
2023
Neptune Cloud Decline
Hubble monitoring contributes evidence that Neptune's mid-latitude cloud cover fell dramatically after 2019.
Records, sources and methodology
These dates and descriptions come from the historical_events database. Exact duplicate records have been collapsed. Names are grouped by the country, Name 2 and Name 1 fields; records with missing Name 2 cannot be reliably assigned to an individual biography. Check the underlying sources before formal citation.