Atmosphere of Uranus vast. The number density of atomic hydrogen in the corona falls slowly with the distance from the planet, remaining as high a few hundred atoms per cm at a few radii from Uranus. The effects of this bloated exosphere include a drag on small particles orbiting Uranus, causing a general depletion of dust in the Uranian rings. The infalling dust in turn contaminates the upper atmosphere of the planet. Uranus has a relatively bland appearance, lacking broad colorful bands and large clouds prevalent on Jupiter and Saturn. No discrete features were observed in Uranus's atmosphere before 1986. The most conspicuous
Imiloa Astronomy Center of Hawaii gift shop, and Sky Garden café are open to the public Tuesday through Sunday. An evening "Maunakea Skies" star talk is held in the planetarium on the last Saturday of each month. In the Hawaiian language, ‘Imiloa means "exploring new knowledge." It is located at 600 ‘Imiloa Place in Hilo, just north of Hawaii Route 2000 (Pūʻāinakō Street). In September 2012 the Sagan Planet Walk, until then located only in Ithaca, New York, was extended with a statue representing Alpha Centauri installed at the Imiloa Astronomy Center. This made the Sagan Planet Walk the world's largest exhibition. Imiloa Astronomy Center