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The Great Dark Spot was captured by NASA's Voyager 2 space probe in Neptune's southern hemisphere. The dark, elliptically shaped spot (with initial dimensions of 13,000 × 6,600 km, or 8,100 × 4,100 mi), was about the same size as Earth, and was similar in general appearance to Jupiter's Great Red Spot.
Due to seasonal changes, the cloud bands in the southern hemisphere of Neptune have been observed to increase in size and albedo. This trend was first seen in 1980. The long orbital period of Neptune results in seasons lasting 40 Earth years. [109] Neptune differs from Uranus in its typical level of meteorological activity.
Cloud decks in parallel bands of latitude at and below the tropopause alternately composed of ammonia crystals and ammonium hydrosulfate. Cirriform Bands of cloud resembling cirrus located mainly in the highest of three main layers that cover Jupiter. [28] Stratiform and stratocumuliform Wave and haze clouds that are seen mostly in the middle ...
The Small Dark Spot was discovered in 1989 by the Voyager 2 spacecraft along with the Great Dark Spot and Scooter (a bright fast moving cloud located between the two giant storms). The Small Dark Spot was found at a latitude of 54° South while rotating East around Neptune with a period of 16.1 hours. [4]
The asteroid and comet belts orbit the Sun from the inner rocky planets into outer parts of the Solar System, interstellar space. [16] [17] [18] An astronomical unit, or AU, is the distance from Earth to the Sun, which is approximately 150 billion meters (93 million miles). [19]
The James Webb Space Telescope (JWST) is a space telescope designed to conduct infrared astronomy.As the largest telescope in space, it is equipped with high-resolution and high-sensitivity instruments, allowing it to view objects too old, distant, or faint for the Hubble Space Telescope. [9]
Rings of Neptune imaged by the James Webb Space Telescope's NIRCam instrument. The rings of Neptune consist primarily of five principal rings.They were first discovered (as "arcs") by simultaneous observations of a stellar occultation on 22 July 1984 by André Brahic's and William B. Hubbard's teams at La Silla Observatory (ESO) and at Cerro Tololo Interamerican Observatory in Chile. [1]
On Jupiter, the visible cloud bands gave indication for upward motion in the zones and downward motion in the belts, indicative only for the upper few bars. [39] However, higher frequency of lightning flashes in the belts, indicative of upward atmospheric motion, gave indication for a reversed motion in the deeper atmosphere.