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ECLIPSE SOLAR-Historias desde la franja de la totalidad ¿POR QUÉ NO HAY UN ECLIPSE CADA MES? Doctor Paul Doherty Físico del Exploratorium - Para entender la mecánica celestial de los eclipses totales de Sol, es útil crear un modelo en tres dimensiones de la Tierra, la Luna y el Sol. TIERRA SOL Una vez al año, la Tierra completará su órbita alrededor del Sol. La cuerda amarilla representa el plano de la órbita terrestre alrededor del Sol, el plano de la eclíptica. LUNA ÓRBITA DE LA LUNA El plano del aro es el plano de la órbita lunar alrededor de la Tierra. Si estuvieran en el mismo plano, una vez al mes, la Luna estaría sobre la línea entre la Tierra y el Sol y habría un eclipse total de Sol cada mes. Pero la órbita lunar está inclinada cinco grados, 5 GRADOS así que la Luna, recorriendo su órbita, puede pasar por encima del plano de la órbita terrestre alrededor del Sol. PLANO DE LA ÓRBITA TERRESTRE Eso significa que la sombra de la Luna no pasa sobre la Tierra. Así que infrecuentemente ocurre un eclipse total de Sol. Nos hemos desplazado tres meses, un cuarto de la órbita de la Tierra. La órbita lunar aún está inclinada, pero en el mismo ángulo que antes. La órbita lunar es como un giroscopio, mientras la Tierra se mueve alrededor del Sol. Ahora, al pasar la Luna, cruza el plano de la órbita de la Tierra. Se coloca entre la Tierra y el Sol y ahora proyecta una sombra sobre la Tierra y crea un eclipse. Así, en esta época del año, tu puedes ver un eclipse solar total. Y, de nuevo, en el otro lado de la órbita, seis meses después, tu puedes ver otro eclipse total de Sol.

Total Solar Eclipse: Stories from the Path of Totality

¿Por Qué No Tenemos un Eclipse Cada Mes?

Published:   April 17, 2019
Total Running Time:   00:01:50

Los eclipses totales de Sol ocurren cuando la luna se interpone entre el Sol y la Tierra y proyecta su sombra sobre nuestro planeta, pero no ocurre un eclipse total de Sol cada mes. Un venerado científico del Exploratorium, el difunto Dr. Paul Doherty, explica por qué no: la órbita de la luna alrededor de la Tierra está inclinada en relación con la órbita de la Tierra alrededor del Sol, por lo tanto, la sombra de la Luna a menudo pasa por debajo o por encima de la Tierra. En esos momentos, no cruza el plano que alinea el Sol y la Tierra, y entonces no crea un eclipse solar. Solo hay dos veces al año en la órbita de la Tierra cuando existe la posibilidad de que ocurra un eclipse total de Sol. Aproximadamente una vez cada 18 meses (en promedio) se puede ver un eclipse total de Sol desde algún lugar de la Tierra, o dos eclipses totales de Sol cada tres años.

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  • In English: Why Don't We Have an Eclipse Every Month?

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