Video Experimental Relacionado
Updated: Jul 11, 2026
10:46
A Method of Trigonometric Modelling of Seasonal Variation Demonstrated with Multiple Sclerosis Relapse Data
Published on: December 9, 2015
Rotación solar anómala a principios del siglo XVII
Science (New York, N.Y.)
|November 25, 1977
Resumen
Los datos de rotación solar de principios del siglo XVII revelan cambios que precedieron al mínimo de Maunder. El sol, el sol, el sol.
Área de la Ciencia:
- Física solar Física solar es la física de la energía solar.
- La astronomía es la astronomía.
- Histórico de la actividad solar.
Sus antecedentes:
- El Mínimo de Maunder (1645-1715) fue un período de actividad solar significativamente reducida.
- Comprender los cambios de rotación solar durante esta era es crucial para los modelos de dínamo solar.
Objetivo del estudio:
- Para analizar las características de rotación solar a principios del siglo XVII.
- Investigar posibles vínculos entre la rotación solar y el inicio del mínimo de Maunder.
Principales métodos:
- Análisis de dibujos detallados de manchas solares de los años 1625-1626 y 1642-1644.
- Comparación de los parámetros de rotación solar (velocidad ecuatorial, rotación diferencial) entre los dos períodos.
Principales resultados:
- La rotación solar en 1625-1626 se parecía a la rotación solar moderna.
- Entre 1642-1644, la velocidad ecuatorial del Sol aumentó en un 3-5%.
- La rotación diferencial se intensificó por un factor de 3 durante el período posterior, en correlación con la disminución de la actividad solar.
Conclusiones:
- Un cambio significativo en la rotación de la superficie solar ocurrió entre 1625 y 1645.
- Este cambio de rotación probablemente coincidió con el inicio del Mínimo de Maunder.
- La aceleración ecuatorial observada se alinea con las tendencias recientes de los datos Doppler.
Videos de Conceptos Relacionados
01:26Rotational Motion about a Fixed Axis
A rigid body's rotation around a fixed axis makes every point within it trace a circular path around a specific line or point. The term given to this type of spinning is defined by the angular position, symbolized by the angle θ. This angle is gauged from a static reference line to the revolving object. From this angular position, any variation is referred to as angular displacement, denoted by dθ. The extent of this displacement can be calculated in degrees, radians, or revolutions, where one...
01:28Apparent Weight and the Earth's Rotation
Since all objects on the Earth's surface move through a circle every 24 hours, there must be a net centripetal force on each object, directed towards the center of that circle. The points of the north and south poles are the only exception to this rule.
For an object on the Earth's equator, the net centripetal force that accounts for its rotation is the Earth's pull towards its center, or the weight minus the normal force that prevents it from piercing into the Earth's surface. This force,...
For an object on the Earth's equator, the net centripetal force that accounts for its rotation is the Earth's pull towards its center, or the weight minus the normal force that prevents it from piercing into the Earth's surface. This force,...
01:24Gyroscope: Precession
Precession can be demonstrated effectively through a spinning top. If a spinning top is placed on a flat surface near the surface of the Earth at a vertical angle and is not spinning, it will fall over due to the force of gravity producing a torque acting on its center of mass. However, if the top is spinning on its axis, it precesses about the vertical direction, rather than topple over due to this torque. Precessional motion is a combination of a steady circular motion of the axis and the...
01:10Kepler's First Law of Planetary Motion
In the early 17th century, German astronomer and mathematician Johannes Kepler postulated three laws for the motion of planets in the solar system. He formulated his first two laws based on the observations of his forebears, Nikolaus Copernicus and Tycho Brahe.
Polish astronomer Nikolaus Copernicus put forth a theory that stated a heliocentric model for the solar system. According to this heliocentric theory, all the planets, including Earth, orbit the Sun in circular orbits.
On the other hand,...
Polish astronomer Nikolaus Copernicus put forth a theory that stated a heliocentric model for the solar system. According to this heliocentric theory, all the planets, including Earth, orbit the Sun in circular orbits.
On the other hand,...
01:23Coriolis Force
An accelerating particle experiences a force equal to the mass multiplied by the acceleration in an inertial frame of reference. Consider a particle in a non-inertial frame of reference, such as a sliding ball on a rotating table. The acceleration of the ball in this rotating reference frame is different than in the intertial frame, which modifies its equation of motion. The fictitious forces acting additionally on a rotating frame of reference alter Newton's Second Law expression. Centripetal...
01:19Magnetic Declination
Magnetic declination is the angle between true north, which aligns with the Earth's rotational axis, and magnetic north, which follows the direction of the Earth's magnetic field. This discrepancy exists because the magnetic poles do not coincide with the geographic poles. The value of magnetic declination depends on the observer's location on Earth and is subject to changes over time due to the dynamic nature of the Earth's magnetic field.The declination is called eastern when magnetic north...