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If You Can Observe Only One Celestial Event This Month, See This One: Earthshine 7/16 Venus View Through 7/14

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If You Can Observe Only One Celestial Event This Month, See This One: Earthshine 7/16 Venus View Through 7/14 If you can observe only one celestial event this month, see this one: Earthshine 7/16 Venus View through 7/14 Moon will be slightly 10x50 binoculars 7/12 7/13 higher as seen on the in the first half of July West Coast, even higher Crescent Mars 7/10 for viewers in Hawaii. Moon Moon 7/12, 7/08 40 minutes Daylight Venus after sunset Mars 7/11 7/10 Venus & Mars meet the crescent Moon True horizon 7/09 During the first half of July, Venus approaches, then Sun passes Mars in the early evening sky. The brilliant planet Moon passes above the Sun, rises higher each evening while the much dimmer Red 10 pm EDT 7/09 Planet drops closer to the horizon. They are at their Ecliptic nearest to each other on July 13, although they shine in July 2021: the same binocular field from July 8 through July 16. Venus and Mars 45 minutes after sunset The very thin crescent Moon adds to the scene on July 11 very low in the west. and 12. (It will be a real challenge to spot just above the true horizon in the bright twilight on July 10.) July 11, Moon appears about • Very clear skies and an unobstructed western horizon 40 min. after sunset "3/4 fist width on a are needed. fully extended arm" • Use binoculars. Mars may not be visible to the unaided above the true western eye as it lies in the bright twilight, but it will likely be horizon 40 minutes found through 10x50 glasses. Simply locate bright Venus West after sunset. and Mars will be seen to its immediate left. Navigating the mid July Night Sky For observers in the middle The stars plotted represent those which northern latitudes, this chart North can be seen from areas suffering is suitable for mid July from moderate light pollution. at 11 p.m. or late July In larger cities, less than near 10 p.m. 100 stars are visible, while from dark, rural areas well over ten times that amount are found. + Cassiopeia Polaris, M31 the North Star Pointer Stars to the North Star North the to Stars Pointer 1 Cepheus Alcon/Mizar – nice binocular double star Coma Berenices Deneb Star Cluster Milky Way A C 2 East Vega M13 Denebola Cygnus Zenith The 5 Summer + 4 Triangle West CoathangerThe Keystone Arcturus Spring The Cluster of Hercules Triangle D Northern Altair Great Rift Crown 3 E Jupiter Aquila Moon night of Spica July 25 Numerous star clusters Saturn and nebulae Zubenelgenubi – nice B binocular double star The Relative sizes Teapot Antares Omega Scorpii – nice and distances binocular double star in the sky can Sagittarius Scorpius be deceiving. For The Ecliptic represents instance, 360 "full the plane of the solar False moons" can be placed system. The sun, the moon, Comet side by side, extending from and the major planets all lie on or South horizon to horizon. near this imaginary line in the sky. Relative size of the full moon. Navigating the mid July night sky: Simply start with what you know or with what you can easily find. 1 Extend a line north from the two stars at the tip of the Big Dipper's bowl. It passes by Polaris, the North Star. 2 Follow the arc of the Dipper's handle. It first intersects Arcturus, the brightest star in the July evening sky, then continues to Spica. 3 Arcturus, Spica, and Denebola form the Spring Triangle, a large equilateral triangle. 4 To the northeast of Arcturus shines another star of similar brightness, Vega. Draw a line from Arcturus to Vega. It first meets "The Northern Crown," then the "Keystone of Hercules." A dark sky is needed to see these two dim stellar configurations. 5 High in the East lies the Summer Triangle stars of Vega, Altair, and Deneb. Binocular Highlights A: Between Denebola and the tip of the Big Dipper's handle, lie the stars of the Coma Berenices Star Cluster. B: Between the bright stars Antares and Altair, hides an area containing many star clusters and nebulae. C: On the western side of the Keystone glows the Great Hercules Cluster, containing nearly 1 million stars. D: 40% of the way between Altair and Vega, twinkles the "Coathanger," a group of stars outlining a coathanger. E: Sweep along the Milky Way for an astounding number of faint glows and dark bays, including the Great Rift. Astronomical League www.astroleague.org/outreach; duplication is allowed and encouraged for all free distribution. Navegando por el cielo nocturno de julio Las estrellas trazadas representan las que se Para los observadores en las Norte pueden ver desde las áreas que sufren latitudes medias del de contaminación Luminica hemisferio norte, este mapa Moderada. En ciudades es adecuado para mediados grandes, menos de 100 de julio a las 11 pm. o estrellas son visibles, finales de julio cerca mientras que desde la de las 10 p.m. oscuridad de las zonas rurales más de diez veces esa Polaris, cantidad se + Casiopea La estrella encuentran. M31 polar 1 ctea á Cefeo Mizar/Alcor – buena estrella doble para binoculares Cabellera Via L Deneb de Berenice A B 2 Vega M13 Denébola Este Cisne 5 Cenit Triangulo + 4 de Verano Oeste Arturo Triangulo de El cúmulo de La Piedra La Corona Primavera la percha Angular de del Norte D Hercules 3 Altair GranLa Júpiter Grieta Aguila Luna la noche del 25 de Julio Numerosos Espiga cúmulos de estrellas y Saturno nebulosas Tamaños Zubenelgenubi – buena C estrella doble para relativos y binoculares distancias en el cielo puede n Antares Omega Scorpii – buena La ó estrella doble para ser engañoso. Por Tetera binoculares ejemplo, 360 "lunas La Linea de la Eclíptica llenas" pueden ser Sagitario colocadas lado a lado, representa el plano del Escorpi Falso extendiéndose de sistema solar. El sol, la luna, Cometa y los planetas principales se horizonte a horizonte. encuentran en o cerca de esta Sur Tamaño relativo de la luna llena. línea imaginaria en el cielo. Navegando por el cielo nocturno: simplemente comience con lo que sabe o con lo que puede encontrar fácilmente. 1 Haz una línea hacia el norte desde las dos estrellas en la punta de la Osa Mayor. Pasa por Polaris, la estrella polar. 2 Siga el arco del mango del tazón de la Osa Mayor. Primero cruza Arturo, luego continúa hacia Espiga. 3 Arturo, Espiga y Denébola forman el triángulo de primavera, un gran triángulo equilátero. 4 Dibuja una línea desde Arturo a Vega. Un tercio del camino se encuentra "La Corona del Norte". Dos tercios de esa distancia llevan a la "piedra angular de Hércules." Se necesita un cielo oscuro para ver estas dos configuraciones estelares tenues. 5 En lo alto del este se encuentran las tres estrellas brillantes del Triángulo de verano: Vega, Altair y Deneb. Puntos destacados con binoculares A: Mira alto en el este para ver el cúmulo de estrellas perdidas de Cabellera de Berenice. B: M13, un brillo redondo de un cúmulo de más de 500,000 estrellas. C: Entre las brillantes estrellas de Antares y Altair, se esconde un área que contiene muchos cúmulos de estrellas y nebulosas. D: Casi a la mitad de la distancia entre Altair y Vega, Brilla la "Percha," un grupo de estrellas que describe un perchero. Traducción al español por Dr. Salvador Aguirre www.astroleague.org/outreach; Duplicación permitida y fomentada para toda distribución gratuita. Liga Astronómica.
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