Thalassa moon simple english wikipedia, the free encyclopedia. All but the outer two are within neptunesynchronous orbit neptunes rotational period is 0. Earth has only the one natural satellite, which we are familiar with the moon. Thalassa was discovered by in 1989 by voyager 2 during its encounter with neptune. Neptune is the eighth and farthest known planet from the sun in the solar system. Thalassa hellas, container ship details and current.
On july 20, 1969, neil armstrong and edwin buzz aldrin became the first people to reach the moon when their apollo 11 lunar lander eagle touched down in the sea of tranquility. Media in category thalassa mythology the following 10 files are in this category, out of 10 total. European space agency esa all these facts about earth and moon coupling that are conducive to complex life. The discovery was said iauc 4867 on september 29, 1989, but the text. Aug 12, 2016 earth has only the one natural satellite, which we are familiar with the moon. It is named after galatea, one of the nereids of greek legend. Discovery of neptunes inner moon hippocamp with the hubble. This is happening because the moon is slowing earths rotation, and as a result, the moon uses the lost energy to propel itself away from earth.
The last moon to be discovered during the flyby, it was designated s1989 n 6. The moons average distance from earth is 238,000 miles 383,500 km. The estimated masses of the two innermost moons, naiad and thalassa, are gmnaiad. Thalassa, like naiad, most likely formed from fragments of neptunes original moons, which were smashed by the disturbances caused when the ice giant neptune captured triton. Neptune is 17 times the mass of earth, slightly more massive than its neartwin uranus. If rings were in fact present, the stars luminosity would decrease slightly. The most distant moon of neptune is called neso, and orbits so far away that it takes 26 years to make one trip around the planet. Naiad is not a sphere and probably has not been changed by any internal geological processes after its formation. Neptune facts temperature, surface, information, history. The third full moon in a fourfullmoon season rule was detailed in a 1937 edition of. The moon miranda, innermost of the five large moons, was revealed to be one of the strangest bodies yet seen in the solar system. Neptune is denser and physically smaller than uranus because its greater mass causes more.
The moon has been earths constant companion for most of its history, even though the mechanism of its formation is still the subject of some debate in astronomical circles. Mar 23, 2017 the six apollo crews came back to earth with a total of 850 pounds 385 kg of the moon. Vessel thalassa elpida cargo ship imo 9665621, mmsi 564388000. It orbits neptune in 7 hours, 30 minutes about 25,200 kilometers 15,700 miles above the cloud tops. It was named after a daughter of aether and hemera from greek mythology. The current position of thalassa hellas is at red sea coordinates 21. Naiad, thalassa, despina, larissa, hippocamp and proteus.
It is likely that it is a rubble pile reaccreted from fragments of neptunes original satellites, which were smashed up by perturbations from triton soon after that moons capture into a very eccentric initial orbit. It is likely that it is a rubble pile reaccreted from fragments of neptunes original satellites, which were smashed up by perturbations from triton soon after that moon s capture into a very eccentric initial orbit. Neptunes winds travel at more than 1,500 mph, and are the fastest planetary winds in the solar system. Thalassa foreshadows later psychosomatic studies such as norman o. Thalassa, passenger cruise ship details and current. Orbits and resonances of the regular moons of neptune. The moon is earths nearest cosmic neighbor, but it is more than just a big pretty light in the sky. It has an irregular shape and shows no sign of geologic activity. Thalassa is unusual for an irregular moon because it is roughly diskshaped. Thalassa was a primordial deity in greek mythology, goddess of the sea. Here are 10 cool, and sometimes surprising, facts about earths nearest neighbor. Neptune has 14 natural satellites, the names of the moon are triton, nereid, despina, naiad, thalassa, proteus, galatea, larissa, sao, neso, psamathe, laomedeia, halimede, s2004 n 1.
The moon or luna is the earths only natural satellite and was formed 4. News for thalassa elpida mega container ship troubled in piraeus may 1, 2019 at 14. It was found sometime before midseptember, 1989 from the images taken by the voyager 2 probe. By the numbers thalassa nasa solar system exploration. Not much is known about this moon except that it circles neptune in the same direction as the planet rotates. Moon abcs fact sheet exploring the moon a teachers guide with activities, nasa eg199710116hq 17 property earth moon brain busters equatorial 12,756 km 3,476 km diameter surface area 510 million 37. Jupiter has 67 moons, the most out of the planets in our solar system. Vessel thalassa elpida cargo ship imo 9665621, mmsi. The two innermost satellites, naiad and thalassa, orbit between the.
Naiad or neptune iii is the closest moon to neptune named after the naiads of greek legend. See all 6 formats and editions hide other formats and editions. These dark areas are referred to as lunar maria, which are basically land basins on the moon in varying sizes. In hesiods work the protogenoi god of the sea was pontus, but is in the fabulae hyginus where thalassa is mentioned. Media in category thalassa moon the following 3 files are in this category, out of 3 total. First integrated orbits of the inner satellites of neptune. Jun 21, 20 the moon is earths nearest cosmic neighbor, but it is more than just a big pretty light in the sky. Orbits and resonances of the regular moons of neptune arxiv. Thalassa is a numerical propagation code for orbits in the earth moon sy stem, integrat ing either unregularized or regularized equations of motion through a multistep, variable stepsize and. Thalassa is also the greek word for sea thalassa was discovered sometime before midseptember, 1989 from the images taken by the voyager 2 probe. The first unmanned mission to the moon was in 1959 by the soviet lunar program with the first manned landing being apollo 11 in 1969. Larissa circles the planet in the same direction as neptune rotates, and remains. Naiad, the closest regular moon, is also the second smallest among the inner moons following the discovery of hippocamp, whereas proteus is the largest regular moon and the second largest moon of neptune. Neptune was discovered by urbain le verrier, john couch adams, and johann galle on september 23, 1846.
The moon covers only a few pixels, but seems to be a stretched object with axes 150 20 and 120 20 km, close to the earthbased estimations. Its mass is estimatedcalculated at being 374,667,108,274,298,000 kg. The discovery was said iauc 4867 on september 29, 1989, but the text only talks of 25 frames taken over 11 days, giving a discovery date of sometime before september 18. Moon planet distance from orbital period diameter density planet miles days miles water1 moonearth238,900 27. Antakya archaeology museum thalassa and the nude fisherman mosaic sept 2019 6169. In order of distance from neptune, the regular moons are naiad, thalassa, despina, galatea, larissa, hippocamp, and proteus. The current position of thalassa is at north sea coordinates 53. It is named after galatea, one of the nereids of greek legend galatea was found in late july 1989 from the images taken by the voyager 2 probe. In the most general terms, thalassa was regarded as a protogenoi, a primordial deity of the greek pantheon, but the goddess is not one that appears in hesiods theogony, the most oft used source for names and genealogy of the greek gods and goddesses. The goddess thalassa in greek mythology greek legends. Galatea moon simple english wikipedia, the free encyclopedia.
Galatea or neptune vi, is the fourth closest moon to neptune. Thalassa was discovered sometime before midseptember, 1989 from the images taken by the voyager 2 probe. The first five moons orbit much faster than neptunes rotation itself ranging from 7 hours for naiad and thalassa, to hours for larissa. The largest, triton, orbits neptune in a direction opposite to. The goddess thalassa in greek mythology greek legends and myths.
This particular blue moon is a technical blue moon, but does not meet the criteria for the second definition. It is irregularly shaped and shows no sign of any geological modification. The rate of recession is known precisely because astronomers regularly fire powerful lasers at the moon, and some of the light is returned by mirrors placed on the moon by apollo astronauts. The idea that the moon physically changed shape from phase to phase was soon recognized as false, since the dark. In the solar system, it is the fourthlargest planet by diameter, the thirdmostmassive planet, and the densest giant planet. Thalassa article about thalassa by the free dictionary. Thalassa was discovered in august 1989 in images taken by voyager 2. Pdf the planet neptune and its largest moon triton hold the keys to major advances across multiple. Thalassa circles the planet in the same direction as neptune rotates. Thalassa or neptune iv, is the second closest moon to neptune.
Moon facts interesting facts about the earths moon. The moon is in synchronous rotation with earth meaning the same side is always facing the earth. Thalassa appears to be about 80 kilometers 50 miles in diameter. Naiad, the closest regular moon, is also the second smallest among the inner moons following the. The six apollo crews came back to earth with a total of 850 pounds 385 kg of the moon. Other moons of neptune the solar system on sea and sky. Neptune has eight known moons, six of which were discovered by v oyager 2. May 12, 2017 neptunes winds travel at more than 1,500 mph, and are the fastest planetary winds in the solar system. In february and march 2007, the new horizons spacecraft to pluto made a series of pictures of himalia, culminating in photos from a distance of eight million km. Mega container ship thalassa elpida understood to collide with pier during berthing early in the morning may 1 in piraeus greece, information to be confirmed or corrected. Larissa lareesuh is only about 48,800 kilometers 30,300 miles from neptunes clouds, and circles the planet in hours, 18 minutes.
Unusually for irregular bodies, it appears to be roughly diskshaped. There is also an asteroid called 74 galatea galatea or neptune vi, is the fourth closest moon to neptune. September, 2015 peter christoforou astronomy lists, solar system 0. Galatea was found in late july 1989 from the images taken by the voyager 2 probe. Neptune is a gaseous planet, composed of hydrogen, helium, methane, with traces of ammonia and water. In xenophons account of the war between artaxerxes ii of persia and his younger brother cyrus, he relates how retreating greek soldiers of the defeated cyrus fought their way through the armenian mountains and finally reached the black sea. The only available image of thalassa appears elongated due to smearing. The discovery was said iauc 4824 on august 2, 1989. The closest moon is naiad 36 miles away and the farthest largest moon is triton 1677 miles away. The vessel is en route to the port of harlingen, and expected to arrive there on apr 28, 19. Next is an unnamed ring coorbital with the moon galatea, then le verrier, lassell, arago, and galle. The vessel is en route to the port of jeddah, and expected to arrive there on may 3, 04. The discovery was said iauc 4824 on august 2, 1989, but the text only talks of 10 frames taken over 5.
The moons heavily cratered surface is evidence of the many meteorite impacts that occurred in the inner solar system during the late heavy bombardment period. With a diameter of 2,159 miles 3,475 kilometers, the moon is just 14 the size of earth. Detailed images from voyagers flyby of the moon showed huge fault canyons as deep as 20 kilometers 12 miles, terraced layers, and a mixture of old and young surfaces. The customer declares having obtained from accor all of the necessary information about the services concerned. Neptune is the fourth largest planet in the solar system. She was married to the titan god of the sea pontus, with whom she had ten children. Saturn has 62 moons, the second planet to have the most moons.