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Nereid, or Neptune II, is the third-largest moon of Neptune. It has the most eccentric orbit of all known moons in the Solar System . [ 4 ] It was the second moon of Neptune to be discovered, by Gerard Kuiper in 1949.
The size of solid bodies does not include an object's atmosphere. For example, Titan looks bigger than Ganymede, but its solid body is smaller. For the giant planets , the "radius" is defined as the distance from the center at which the atmosphere reaches 1 bar of atmospheric pressure.
Size comparison between Proteus (lower left), the Moon (upper left) and Earth. Proteus is the second-largest moon of Neptune and is the largest of its regular prograde moons. It is about 420 km (260 mi) in diameter, larger than Nereid, Neptune's third-largest moon.
Known from ribs, a partial humerus, a possible tooth and vertebral centra, the largest of which measured 45 cm (18 in) in diameter. With centra almost twice the diameter of those belonging to the largest ichthyosaur with preserved vertebrae, Shastasaurus sikanniensis , it may have been among the largest vertebrates to ever exist. [ 5 ]
The peak ring is about 80 km in diameter and of variable height, 400 to 600 meters (1,300 to 2,000 ft) above the base of the crater in the west and northwest and 200 to 300 meters (660 to 980 ft) in the north, northeast, and east. [26]
Halimede is about 62 kilometers in diameter (assuming an albedo of 0.04) [5] and appears neutral (grey) in the visible light. Given the very similar colour of the satellite to that of Nereid together with the high probability (41% [ 7 ] ) of collision in the past lifespan of the Solar System, it has been suggested that the satellite could be a ...
Ragworms' teeth are made of a very tough, yet lightweight material. Unlike bone and tooth enamel, this is not mineralised with calcium, but is formed by a histidine rich protein, with bound zinc ions. [1] Research on this material could lead to applications in engineering. [2]
They are estimated to have averaged 143.6 cm (4 ft 9 in) in height and 39.7 kg (88 lb) in weight, yielding a small relative brain size, encephalization quotient, of 4.5. H. naledi brain anatomy seems to have been similar to contemporary Homo , which could indicate comparable cognitive complexity.