Video Experimental Relacionado
Updated: Jul 12, 2026
11:34
Scattering And Absorption of Light in Planetary Regoliths
Published on: July 1, 2019
El descubrimiento de rastros de polvo en las órbitas de los cometas periódicos
Science (New York, N.Y.)
|May 30, 1986
Resumen
Los datos del satélite astronómico infrarrojo revelan rastros de polvo de los cometas periódicos Tempel 2, Encke y Gunn. Esto sugiere que muchos más cometas no observados también pueden producir rastros de polvo detectables.
Área de la Ciencia:
- La astronomía y la astrofísica.
- Ciencia del sistema solar Ciencia del sistema solar
Sus antecedentes:
- Los cometas periódicos son fuentes conocidas de polvo interplanetario.
- Comprender los mecanismos de producción de polvo es crucial para los modelos de evolución del sistema solar.
Objetivo del estudio:
- Para analizar los datos del satélite astronómico infrarrojo (IRAS) en busca de evidencia de rastros de polvo cometario.
- Para investigar el origen y la distribución del polvo asociado con los cometas periódicos conocidos.
Principales métodos:
- Análisis de los datos de archivo del satélite astronómico infrarrojo (IRAS).
- Identificación de estrechas huellas de polvo coincidentes con las órbitas conocidas de los cometas.
- Correlación de las posiciones de las huellas de polvo con las trayectorias orbitales de los cometas.
Principales resultados:
- Se han confirmado estrechas huellas de polvo asociadas con los cometas periódicos Tempel 2, Encke y Gunn.
- El polvo observado se encuentra tanto delante como detrás de las posiciones orbitales cometarias.
- Se detectaron más de 100 posibles rastros de polvo adicionales, muchos cerca de los límites de detección de IRAS.
- Producción de polvo inferida a través de la eyección de baja velocidad de partículas grandes durante el paso del perihelio.
Conclusiones:
- Los datos del satélite astronómico infrarrojo (IRAS) proporcionan una fuerte evidencia de las pistas de polvo cometario.
- Muchas de las nuevas pistas de polvo sugeridas pueden originarse en cometas no observados anteriormente.
- Los hallazgos mejoran nuestra comprensión de las fuentes de polvo en el sistema solar interior.
Más Videos Relacionados
Videos de Conceptos Relacionados
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,...
01:16Circular Orbits and Critical Velocity for Satellites
The Moon orbits around the Earth. In turn, the Earth (and other planets) orbit the Sun. The space directly above our atmosphere is filled with artificial satellites in orbit. One can examine the circular orbit, the simplest kind of orbit, to understand the relationship between the speed and the period of planets and satellites with respect to their positions and the bodies that they orbit.
Nicolaus Copernicus (1473-1543) first suggested that the Earth and all other planets orbit the Sun in...
Nicolaus Copernicus (1473-1543) first suggested that the Earth and all other planets orbit the Sun in...
01:10Detection of Black Holes
Although black holes were theoretically postulated in the 1920s, they remained outside the domain of observational astronomy until the 1970s.
Their closest cousins are neutron stars, which are composed almost entirely of neutrons packed against each other, making them extremely dense. A neutron star has the same mass as the Sun but its diameter is only a few kilometers. Therefore, the escape velocity from their surface is close to the speed of light.
Not until the 1960s, when the first neutron...
Their closest cousins are neutron stars, which are composed almost entirely of neutrons packed against each other, making them extremely dense. A neutron star has the same mass as the Sun but its diameter is only a few kilometers. Therefore, the escape velocity from their surface is close to the speed of light.
Not until the 1960s, when the first neutron...
01:27Eccentricity of an Ellipse
An ellipse is a fundamental conic section defined by the constant sum of distances from any point on its curve to two fixed points, known as the foci. This geometric property can be physically demonstrated using a pencil, string, and two pins. By anchoring the string at both ends and maintaining it taut with a pencil, one can trace the outline of an ellipse.The shape and extent of the ellipse are determined by its eccentricity, e, defined as the ratio of the distance between the center and a...
01:20Momentum And Radiation Pressure
An object absorbing an electromagnetic wave would experience a force in the direction of propagation of the wave. This force occurs because electromagnetic waves contain and transport momentum. The force accounts for the wave's radiation pressure exerted on the object. Maxwell's prediction was confirmed in 1903 by Nichols and Hull by precisely measuring radiation pressures with a torsion balance. The measuring instrument had mirrors suspended from a fiber kept inside a glass container. Nichols...
01:18Kepler's Third 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. In 1909, he formulated his first two laws based on the observations of his forebears, Nikolaus Copernicus and Tycho Brahe. However, in 1918, he published his third law of planetary motion, which gives a precise mathematical relationship between a planet's average distance from the Sun and the amount of time it takes to revolve around the Sun. It...