i., gökb. neptün

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Neptune
The god of the ocean and of earthquakes
The eighth planet in our solar system, represented in astronomy and astrology by ♆
{i} 8th planet from sun in solar system (Astronomy); god of the sea (Roman Mythology)
The eighth planet in our solar system, represented in astronomy and astrology by ♆
the planet that is eighth in order from the sun. Eighth planet from the Sun, discovered in 1846 and named after the Roman god of the sea. It has an average distance from the Sun of 2.8 billion mi (4.5 billion km), taking 165 years to complete one orbit and rotating every 16.11 hours. Neptune has more than 17 times Earth's mass, 58 times its volume, and 12% stronger gravity at the top of its atmosphere. It has an equatorial diameter of 30,775 mi (49,528 km). Neptune consists largely of hydrogen and helium. It has no apparent solid surface but may have a frozen, rocky core. Its atmosphere contains substantial amounts of methane gas, whose absorption of red light causes Neptune's deep blue colour. The Voyager 2 space probe in 1989 discovered winds of over 1,570 mi/hour (700 m/second), the fastest known for any of the Sun's planets, and dark spots that may be storms similar to Jupiter's Great Red Spot. Neptune receives little solar radiation, but temperature measurements of about -353 °F (-214 °C) suggest an internal heat source. Neptune's weak magnetic field traps solar wind and cosmic rays in a belt around the planet. Neptune has a system of rings, made largely of dust-sized particles, and eight known satellites; the largest is Triton, almost as big as Earth's Moon. In Roman religion, the god of water. Neptune was originally the god of fresh water, but by 399 BC he was identified with the Greek god Poseidon and thus became a deity of the sea. His female counterpart, Salacia, probably began as a goddess of spring water but was later equated with the Greek goddess Amphitrite. Neptune's festival (Neptunalia) took place in the heat of summer (July 23), when fresh water was scarcest. In art Neptune is often given Poseidon's attributes, the trident and dolphin
The Roman god of the ocean and of earthquakes
i., gökb. neptün
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