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Esperanza Hernandez
Physics
13 October, 23:21
Científico que formuló 3 leyes de astronomía
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Robert Maddox
13 October, 23:44
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El astrónomo alemán Johannes Kepler
Explanation:
Primera Ley:
Los planetas giran alrededor del Sol siguiendo una trayectoria elíptica. El Sol se sitúa en uno de los focos de la elipse.
La excentricidad e de una elipse es una medida de lo alejado que se encuentran los focos del centro.
Pues bien, la mayoría de las órbitas planetarias tienen un valor muy pequeño de excentricidad, es decir e ≈ 0. Esto significa que, a nivel práctico, pueden considerarse círculos descentrados.
Segunda Ley:
La recta que une el planeta con el Sol barre áreas iguales en tiempos iguales. Para que esto se cumpla, la velocidad del planeta debe aumentar a medida que se acerque al Sol. Esto sugiere la presencia de una fuerza que permite al Sol atraer los planetas, tal y como descubrió Newton años más tarde.
Tercera ley de Kepler:
La tercera ley, también conocida como armónica o de los periodos, relaciona los periodos de los planetas, es decir, lo que tardan en completar una vuelta alrededor del Sol, con sus radios medios.
Para un planeta dado, el cuadrado de su periodo orbital es proporcional al cubo de su distancia media al Sol.
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