The Almost Moon

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The Moon is a differentiated body that was initially in hydrostatic equilibrium but has since departed from this condition. [69] It has a geochemically distinct crust, mantle, and core. The Moon has a solid iron-rich inner core with a radius possibly as small as 240 kilometres (150mi) and a fluid outer core primarily made of liquid iron with a radius of roughly 300 kilometres (190mi). Around the core is a partially molten boundary layer with a radius of about 500 kilometres (310mi). [70] [71] This structure is thought to have developed through the fractional crystallization of a global magma ocean shortly after the Moon's formation 4.5billion years ago. [72] With the different positions of the Moon, different areas of it are illuminated by the Sun. This illumination of different lunar areas, as viewed from Earth, produces the different lunar phases during the synodic month. A phase is equal to the area of the visible lunar sphere that is illuminated by the Sun. This area or degree of illumination is given by ( 1 − cos ⁡ e ) / 2 = sin 2 ⁡ ( e / 2 ) {\displaystyle (1-\cos e)/2=\sin There are still many questions left to answer about the Moon. And the most exciting days of lunar activity may still lie ahead as NASA sends humans on the next missions to the Moon and eventually on to Mars! For more information visit: Giant impacts are thought to have been common in the early Solar System. Computer simulations of giant impacts have produced results that are consistent with the mass of the lunar core and the angular momentum of the Earth–Moon system. These simulations show that most of the Moon derived from the impactor, rather than the proto-Earth. [47] However, models from 2007 and later suggest a larger fraction of the Moon derived from the proto-Earth. [48] [49] [50] [51] Other bodies of the inner Solar System such as Mars and Vesta have, according to meteorites from them, very different oxygen and tungsten isotopic compositions compared to Earth. However, Earth and the Moon have nearly identical isotopic compositions. The isotopic equalization of the Earth-Moon system might be explained by the post-impact mixing of the vaporized material that formed the two, [52] although this is debated. [53]

What Are the Moon’s Phases? - NASA Space Place What Are the Moon’s Phases? - NASA Space Place

The Moon has inspired wonder and creativity for thousands of years. This image appeared in a 1902 French film called "Le Voyage dans la Lune" ("A Trip to the Moon"). Main articles: Internal structure of the Moon and Geology of the Moon Moon's internal structure: solid inner core (iron-metallic), molten outer core, hardened mantle and crust. The crust on the Moon's near side permanently facing Earth is thinner, featuring larger areas flooded by material of the once molten mantle forming today's lunar mare.In chapter twelve, Helen's father takes her to Lambeth, where he shows her the remains of his old house. What is the significance of the plywood people? Do they mean different things to Helen and to her father? Why does he select these particular moments of his life to commemorate? And does the town having been unsuccessfully "drowned" reflect any other situations in the novel? On average the Moon's surface gravity is 1.62 m/s 2 [4] ( 0.1654 g; 5.318 ft/s 2), about half of the surface gravity of Mars and about a sixth of Earth's. Exhilarating, unforgettable ... This is a remarkable novel in which every word is vital, each nuance felt ... Candid, gut-wrenching, at times horribly funny and often beautifully touching ... The genius which guides The Almost Moon is its absolute, horrible, multiple truths; its staggering clarity' Eileen Battersby, Irish Times The gravitational attraction that Earth and the Moon (as well as the Sun) exert on each other manifests in a slightly greater attraction on the sides closest to each other, resulting in tidal forces. Ocean tides are the most widely experienced result of this, but tidal forces also considerably affect other mechanics of Earth, as well as the Moon and their system.

The Almost Moon by Alice Sebold | Book Club Discussion The Almost Moon by Alice Sebold | Book Club Discussion

The newly formed Moon settled into a much closer Earth orbit than it has today. Each body therefore appeared much larger in the sky of the other, eclipses were more frequent, and tidal effects were stronger. [59] The Moon is one of the most recognisable objects in the solar system. This proximity to Earth has given it immeasurable cultural significance and means it plays a key role in Earth's tides.Helen Knightly has spent a lifetime trying to win the love of a mother who had none to spare. And as this electrifying novel opens, she steps over a boundary she never dreamt she would even approach. But while her act is almost unconscious, it also seems like the fulfilment of a lifetime's buried desire. Over the next twenty-four hours, her life rushes in at her as she confronts the choices that have brought her to this crossroads. The Moon appears to change shape as we see more or less of it. These shapes are called the phases of the Moon. So I'm still waiting for the book that fully engages with a daughter psychically married to her emotionally witholding mother; or a novel about an adult child's identification with and fear of an aged, demented parent that comes close to Alice Munro's portrayal of living with a spouse with Alzheimer's in "The Bear Came Over the Mountain". Lurid action is easier to come up with than the subtleties of everyday family chafing you find in works such as Death of a Salesman or A Long Day's Journey Into Night, not that those don't have their drug addiction and adultery. Maybe publishers now would reject such honesty as tame. For humans the Moon has been an important source of inspiration and knowledge, having been crucial to cosmography, mythology, religion, art, time keeping, natural science, and spaceflight. On September 13, 1959 the first human-made object to reach an extraterrestrial body arrived on the Moon, the Soviet Union's Luna 2 impactor. In 1966 the Moon became the first extraterrestrial body where soft landings and orbital insertions were achieved. On July 20, 1969, humans for the first time landed on the Moon and any extraterrestrial body, at Mare Tranquillitatis with the lander Eagle of the United States' Apollo 11 mission. Five more crews were sent between then and 1972, each with two men landing on the surface. The longest stay was 75 hours by the Apollo 17 crew. Thereafter exploration of the Moon has continued robotically, with crewed missions being planned to return starting in the late 2020s.