A Tale of Four Worlds: Hubble’s Ten-Year Hunt for Secrets in the Outer Solar System
NASA and ESA’s Hubble Space Telescope has been observing the outer planets through a program called OPAL (Outer Planet ...
Space.com2d
Dramatic changes on Uranus, Neptune, Saturn and Jupiter revealed in 10 years of Hubble Telescope images (video)
Over the last ten years, OPAL has observed Uranus' northern hemisphere, which has faced the inner solar system for the ...
Science Daily4d
NASA's Hubble celebrates decade of tracking outer planets
A NASA Hubble Space Telescope observation program called OPAL (Outer Planet Atmospheres Legacy) obtains long-term baseline observations of Jupiter, Saturn, Uranus, and Neptune in order to understand ...