The Almost Moon

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As the Moon travels around Earth, different parts of it are lit up by the Sun. These changes in the Moon's appearance from our view on Earth are called moon phases. This graphic shows all eight moon phases we see as the Moon makes a complete orbit of Earth about every four weeks. Credit: NASA/JPL-Caltech Is there actually a “dark side" of the Moon? Analysis of the findings of the Moon Mineralogy Mapper (M3) revealed in August 2018 for the first time "definitive evidence" for water-ice on the lunar surface. [157] [158] The data revealed the distinct reflective signatures of water-ice, as opposed to dust and other reflective substances. [159] The ice deposits were found on the North and South poles, although it is more abundant in the South, where water is trapped in permanently shadowed craters and crevices, allowing it to persist as ice on the surface since they are shielded from the sun. [157] [159] The Moon is orbiting Earth at an average distance of 384,400 kilometres, meaning it would take over 17 days non-stop to fly there on a commercial plane.

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Ionizing radiation from cosmic rays, the Sun and the resulting neutron radiation [97] produce radiation levels on average of 1.369 millisieverts per day during lunar daytime, [14] which is about 2.6 times more than on the International Space Station with 0.53 millisieverts per day at about 400 km above Earth in orbit, 5-10 times more than during a trans-Atlantic flight, 200 times more than on Earth's surface. [98] For further comparison radiation on a flight to Mars is about 1.84 millisieverts per day and on Mars on average 0.64 millisieverts per day, with some locations on Mars possibly having levels as low as 0.342 millisieverts per day. [99] [100] Scott Shane's outstanding work Flee North tells the little-known tale of an unlikely partnership ...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. On Earth, our view of the illuminated part of the Moon changes each night, depending on where the Moon is in its orbit, or path, around Earth. When we have a full view of the completely illuminated side of the Moon, that phase is known as a full moon. The Greek goddess of the wilderness and the hunt, Artemis, equated with the Roman Diana, one of whose symbols was the Moon and who was often regarded as the goddess of the Moon, was also called Cynthia, from her legendary birthplace on Mount Cynthus. [34] These names – Luna, Cynthia and Selene – are reflected in technical terms for lunar orbits such as apolune, pericynthion and selenocentric. The most commonly known effect of tidal forces are elevated sea levels called ocean tides. [171] While the Moon exerts most of the tidal forces, the Sun also exerts tidal forces and therefore contributes to the tides as much as 40% of the Moon's tidal force; producing in interplay the spring and neap tides. [171]

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

The Almost Moon,' by Alice Sebold -- New York Magazine Book Review - Nymag". New York Magazine . Retrieved 2020-09-28. The cumulative effects of stress built up by these tidal forces produces moonquakes. Moonquakes are much less common and weaker than are earthquakes, although moonquakes can last for up to an hour– significantly longer than terrestrial quakes– because of scattering of the seismic vibrations in the dry fragmented upper crust. The existence of moonquakes was an unexpected discovery from seismometers placed on the Moon by Apollo astronauts from 1969 through 1972. [170] Parts of many craters, particularly the bottoms of many polar craters, [104] are permanently shadowed, these " craters of eternal darkness" have extremely low temperatures. The Lunar Reconnaissance Orbiter measured the lowest summer temperatures in craters at the southern pole at 35K (−238°C; −397°F) [105] and just 26K (−247°C; −413°F) close to the winter solstice in the north polar crater Hermite. This is the coldest temperature in the Solar System ever measured by a spacecraft, colder even than the surface of Pluto. [103] No. The Moon is actually gradually getting further away - every single year the Moon moves about four centimetres further out. This is because there is a small amount of friction between Earth and the tides, slowing our planet's rotation. As Earth's spin slows, the Moon is creeping away. How long is a day on the Moon?The English adjective pertaining to the Moon is "lunar", derived from the Latin word for the Moon, lūna. Selenian / s ə l iː n i ə n/ [28] is an adjective used to describe the Moon as a world, rather than as a celestial object, [29] but its use is rare. It is derived from σελήνη selēnē, the Greek word for the Moon, and its cognate selenic was originally a rare synonym [30] but now nearly always refers to the chemical element selenium. [31] The element name selenium and the prefix seleno- (as in selenography, the study of the physical features of the Moon) come from this Greek word. [32] [33] For a long time scientists thought that there was no atmosphere on the Moon, but recent studies have confirmed that there is one. The Moon does not shine with its own light. It simply reflects light coming from the Sun. Why does it look like the Moon is changing shape?

All About the Moon | NASA Space Place – NASA Science for Kids All About the Moon | NASA Space Place – NASA Science for Kids

There is almost no atmosphere on the Moon, which means it cannot trap heat or insulate the surface. The Moon's mass is 1/81 of Earth's, [68] being the second densest among the planetary moons, and having the second highest surface gravity, after Io, at 0.1654 g and an escape velocity of 2.38km/s ( 8 600km/h; 5 300mph). In full sunshine, temperatures on the Moon reach 127°C, way above boiling point. There are 13 and a half days of high temperatures followed by 13 and a half days of darkness, and once the Sun goes down the temperature at the bottom of craters can plummet to -173°C. Is there water on the Moon?

Lunar Terrain

The Moon is by size and mass the fifth largest natural satellite of the Solar System, categorizeable as one of its planetary-mass moons, making it a satellite planet under the geophysical definitions of the term. [18] It is smaller than Mercury and considerably larger than the largest dwarf planet of the Solar System, Pluto. While the minor-planet moon Charon of the Pluto-Charon system is larger relative to Pluto, [f] [66] the Moon is the largest natural satellite of the Solar System relative to their primary planets. [g] Delays in the tidal peaks of both ocean and solid-body tides cause torque in opposition to the Earth's rotation. This "drains" angular momentum and rotational kinetic energy from Earth's rotation, slowing the Earth's rotation. [171] [168] That angular momentum, lost from the Earth, is transferred to the Moon in a process known as tidal acceleration, which lifts the Moon into a higher orbit while lowering orbital speed around the Earth. I had begun to chase my husband as I had once chased my mother, toe to toe, a shadow girl trying to be what I thought they wanted me to be. I”

The Almost Moon by Alice Sebold | Goodreads The Almost Moon by Alice Sebold | Goodreads

Ron Rash is renowned for his writing about Appalachia, but his latest book, The Caretaker, begins ... NASA explores the unknown in air and space, innovates for the benefit of humanity, and inspires the world through discovery. 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 The Moon's axial tilt with respect to the ecliptic is only 1.5427°, [8] [101] much less than the 23.44° of Earth. Because of this small tilt, the Moon's solar illumination varies much less with season than on Earth and it allows for the existence of some peaks of eternal light at the Moon's north pole, at the rim of the crater Peary.

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The Moon reflects light from the Sun and that is why we can see it. It is not a source of light but acts like a mirror. This article is about Earth's natural satellite. For moons in general, see Natural satellite. For other uses, see Moon (disambiguation). The gravitational pull of the Moon causes the water on the nearest side of Earth to bulge outwards, resulting in a high tide. Curiously, it also causes the water on the other side of the Earth to bulge outwards.