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Fiche 1,  Justifications,  Anglais

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The name given to the second full moon in a given month, which occurs about once every three years.  2, fiche 1, Anglais, - blue%20moon

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Phenomenon caused by the presence of large quantities of suspended particles in the atmosphere which selectively remove the longer lunar... visible wavelengths more than the blue... wavelengths.  4, fiche 1, Anglais, - blue%20moon

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... blue moon ... For half a century, it’s been known as the second full moon in a month ... But that’s wrong ... The magazine [Sky & Telescope] incorrectly defined the term 53 years ago. James Hugh Pruett wrote a 1946 piece for the magazine after apparently misinterpreting a complex 1937 article in the Maine Farmer’s Almanac that essentially, but not clearly, said a blue moon occurs when a season has four full moons, rather than the usual three. Pruett mistakenly thought it meant having a second full moon within the same month. Pruett’s mistake went unnoticed for decades. ... Although Sky & Telescope’s editors think Pruett’s mistake led to the popular modern mis-definition of "blue moon," it’s unclear where the Maine Farmer’s Almanac came up with the rule. The almanac is defunct. Pruett died in 1955. ... By either definition -- Pruett’s or the almanac’s -- blue moons occur about every two or three years ... Although purists may subscribe to the almanac’s point of view, Sinnott thinks Pruett’s error will prevail.  5, fiche 1, Anglais, - blue%20moon

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When a month has two full moons the second is known as a "blue" moon, though it only rarely has a blue tint that unusual atmospheric conditions can supply. Occasionally the moon takes on unusual colors, but most often it tends to be reddish, reports Guy Ottewell of Furman University in Greenville, South Carolina.  6, fiche 1, Anglais, - blue%20moon

Fiche 1,  Justifications,  Français

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Phénomène dû à la présence d'une grande quantité de particules suspendues dans l'atmosphère qui éliminent sélectivement les longueurs d'onde relativement grandes de la lumière lunaire [...] visible plutôt que les longueurs d'onde plus courtes, correspondant au bleu [...]  2, fiche 1, Français, - lune%20bleue

Fiche 1,  Justifications,  Espagnol

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Fenómeno debido a la presencia en la atmósfera de una gran cantidad de partículas en superficie que atenúan selectivamente las longitudes de onda más largas de la radiación [...] lunar visible más que las longitudes de onda azules [...]  1, fiche 1, Espagnol, - luna%20azul

Fiche 2,  Justifications,  Anglais

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Phenomenon caused by the presence of large quantities of suspended particles in the atmosphere which selectively remove the longer lunar... visible wavelengths more than the... green wavelengths.  4, fiche 2, Anglais, - green%20moon

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When a month has two full moons the second is known as a "blue" moon, though it only rarely has a blue tint that unusual atmospheric conditions can supply. Occasionally the moon takes on unusual colors, but most often it tends to be reddish, reports Guy Ottewell of Furman University in Greenville, South Carolina. The occasional blue or bluish-green moon can take place when a lot of dust is present in the air, such as after a volcanic eruption, Ottewell notes in his Astronomical Calendar 1999.  5, fiche 2, Anglais, - green%20moon

Fiche 2,  Justifications,  Français

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Phénomène dû à la présence d'une grande quantité de particules suspendues dans l'atmosphère qui éliminent sélectivement les longueurs d'onde relativement grandes de la lumière lunaire [...] visible plutôt que les longueurs d'onde plus courtes, correspondant au [...] vert.  2, fiche 2, Français, - lune%20verte

Fiche 2,  Justifications,  Espagnol

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Fenómeno debido a la presencia en la atmósfera de una gran cantidad de partículas en superficie que atenúan selectivamente las longitudes de onda más largas de la radiación [...] lunar visible más que las longitudes de onda [...] verdes.  1, fiche 2, Espagnol, - luna%20verde

Fiche 3,  Justifications,  Anglais

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One source of the lunar atmosphere is outgassing : the release of gases such as radon that originate from radioactive decay within the crust and mantle.  2, fiche 3, Anglais, - lunar%20atmosphere

Fiche 3,  Justifications,  Français

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L'atmosphère lunaire est majoritairement composée d'atomes d'argon, libéré lors des réactions nucléaires au sein des roches lunaires.  2, fiche 3, Français, - atmosph%C3%A8re%20lunaire

Fiche 3,  Justifications,  Espagnol

Fiche 4,  Justifications,  Anglais

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A lunar halo is a luminous ring that is sometimes seen surrounding the moon. Some parts of the halo are very bright, others are not very bright. Sometimes, only a part of the ring is visible. The halo is produced as moonlight is reflected and refracted through tiny, flat ice crystals in the atmosphere. Halos always are at an angle of 22° away from the moon, due to the hexagonal structure of the ice crystals. The diameter of the halo is about an eighth of the sky.  1, fiche 4, Anglais, - lunar%20halo

Fiche 4,  Justifications,  Français

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Contrairement aux couronnes, les halos ne touchent pas le soleil ou la lune; ils sont des cercles de lumière causés par la réfraction des rayons lumineux par des cristaux de glace. Les différentes formes de cristaux pointant dans différentes directions sont responsables des différentes formes de halos. [...] On peut également observer des halos autour de la pleine lune. Selon le dicton : «lune cerclée, pluie assurée», il semble qu'une fois sur deux la pluie ou la neige tombe un ou deux jours après l'observation d'un halo lunaire.  1, fiche 4, Français, - halo%20lunaire

Fiche 4,  Justifications,  Espagnol

Fiche 5,  Justifications,  Anglais

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The LAD utilizes a cold cathode ionization gauge to measure the density of neutral particles at the lunar surface and the variations in density association with lunar phase or solar activity.  2, fiche 5, Anglais, - lunar%20atmosphere%20detector

Fiche 5,  Justifications,  Français

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le détecteur de l'atmosphère lunaire, l'un des appareils de l'équipement sélénographique d'Apollo, mesure la densité, la température et les variations de l'atmosphère lunaire.  2, fiche 5, Français, - d%C3%A9tecteur%20de%20l%27atmosph%C3%A8re%20lunaire

Fiche 5,  Justifications,  Espagnol