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The narrow and relatively thin main ring is the brightest part of Jupiter's ring system. Its outer edge is located at a radius of about 129,000 km ( 1.806 R J ; R J = equatorial radius of Jupiter or 71,398 km ) and coincides with the orbit of Jupiter's smallest inner satellite, Adrastea .
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Mark Robert Showalter (born December 5, 1957) is a senior research scientist at the SETI Institute. [1] He is the discoverer of six moons and three planetary rings. He is the Principal Investigator of NASA's Planetary Data System Rings Node, a co-investigator on the Cassini–Huygens mission to Saturn, and works closely with the New Horizons mission to Pluto.
Jupiter's ring system was the third to be discovered, when it was first observed by the Voyager 1 probe in 1979, [11] and was observed more thoroughly by the Galileo orbiter in the 1990s. [12] Its four main parts are a faint thick torus known as the "halo"; a thin, relatively bright main ring; and two wide, faint "gossamer rings". [ 13 ]
Valhalla is the largest multi-ring basin on Callisto and in the Solar System (with diameter up to 3,800 km). [4] It was discovered by the Voyager probes in 1979–80 and is located on the leading hemisphere of Callisto, in its Jupiter facing quadrant slightly to the north of the equator (at about 18°N latitude and 57°W longitude).
The NHTSA's Office of Defects Investigation said it had received one complaint alleging a crash when the feature was being used and had reviewed at least three media reports of similar crashes ...
LeBron James continues to amaze at 40 years old. Debate remains on exactly where James lands on the list of basketball's all-time greats. But there's zero debate about his sustained excellence.
The north portal of the 12th-century Urnes stave church has been interpreted as containing depictions of snakes and dragons that represent Ragnarök. [1]In Norse mythology, Ragnarök (/ ˈ r æ ɡ n ə r ɒ k / ⓘ RAG-nə-rok or / ˈ r ɑː ɡ-/ RAHG-; [2] [3] [4] Old Norse: Ragnarǫk [ˈrɑɣnɑˌrɒk]) is a foretold series of impending events, including a great battle in which numerous ...