Like the Earth, Uranus and Neptune have time and experience changes in weather patterns as a result. But unlike Earth, the seasons of the planets last for many years rather than months, and weather patterns take place at a level that can not be described by Earth standards. A good example is the typhoon observed in the atmosphere of Neptune and Uranus, which includes the famous Great Dark Spot of Neptune.
During the annual observation work of Uranus and Neptune, NASA's Hubble Space Telescope (HST) recently observed observations of weather patterns of the same planet. In addition to defining a new and mysterious hurricane in Neptune, Hubble has given a fresh look at a long-lived storm around the Uranus polo. Observations are part of Hubble's long-term mission to improve our understanding of external planets.
New images were taken as part of the Outer Planet Atmospheres Legacy (OPAL) program, a long-term Hubble Project led by Amy Simon of the Goddard Space Flight Center of NASA. Each year, this program captures global maps of the outer planets of our Solar System when they are closest to Earth. One of OPAL's main objectives is to study long-term periodic changes and fairly constant events, such as the emergence of dark areas.