Video Experimental Relacionado
Updated: Jul 9, 2026

06:48
Surface Mapping of Earth-like Exoplanets using Single Point Light Curves
Published on: May 10, 2020
Observaciones científicas por radio de la Voyager de Neptuno y el tritón
Resumen
La Voyager 2 es una nave espacial.
Área de la Ciencia:
- Ciencias planetarias Ciencias planetarias.
- Ciencias de la Radio Ciencias de la Radio.
- Ciencias de la atmósfera Ciencias atmosféricas.
Sus antecedentes:
- La Voyager 2 realizó investigaciones científicas de radio durante su encuentro con el sistema de Neptuno.
- El conocimiento previo de Neptuno y Tritón era limitado, lo que requería mediciones in situ.
Objetivo del estudio:
- Para determinar las masas, densidades y armónicos gravitacionales de Neptuno y Tritón.
- Investigar las estructuras y composiciones atmosféricas e ionosféricas de Neptuno y Tritón.
- Para caracterizar el material de los anillos de Neptuno.
Principales métodos:
- Mediciones de ocultación de radio utilizando la investigación de la ciencia de la radio de la Voyager 2.
- Análisis de la propagación de la señal a través de las atmósferas e ionosferas de Neptuno y Tritón.
- Modelado de campo gravitacional utilizando coeficientes armónicos.
Principales resultados:
- Medidas precisas de las masas, densidades y radios de Neptuno y Tritón.
- Determinación de los armónicos gravitacionales de bajo orden de Neptuno (J(2) y J(4)).
- Caracterización de la composición atmosférica de Neptuno (abundancia de metano) y su estructura, incluidas las capas de nubes.
- Análisis de las ionosferas de Neptuno y Tritón, incluyendo perfiles de temperatura y densidad de electrones.
- Datos preliminares sobre la tenue atmósfera de Tritón, que sugieren un equilibrio de presión de vapor con el hielo de la superficie.
Conclusiones:
- Los datos de radiociencia de la Voyager 2 proporcionaron una visión sin precedentes del sistema de Neptuno.
- La atmósfera de Neptuno exhibe nubes de metano y absorción de amoníaco, mientras que su ionosfera muestra un topside extendido.
- La atmósfera de Tritón es extremadamente tenue y probablemente está controlada por el equilibrio de presión de vapor con el hielo de la superficie.
- No se encontró ningún material de anillo detectable con una profundidad óptica superior a 0.01.
Videos de Conceptos Relacionados
Electromagnetic Waves
James Clerk Maxwell formulated a single theory combining all the electric and magnetic effects scientists knew during that time, calling the phenomena his theory predicted “Electromagnetic waves”. He brought together all the work that had been done by brilliant physicists such as Oersted, Coulomb, Gauss, and Faraday and added his own insights to develop the overarching theory of electromagnetism. Maxwell’s equations, combined with the Lorentz force law, encompass all the laws of electricity and...
Plane Electromagnetic Waves I
The existence of combined electric and magnetic fields that propagate through space as electromagnetic (EM) waves is the most significant prediction of Maxwell's equations. As Maxwell's equations hold in free space, the predicted electromagnetic waves do not require a medium for their propagation. An EM wave comprises an electric field, defined as the force per charge on a stationary charge, and a magnetic field, which is the force per charge on a moving charge.
The EM field is assumed to be a...
The EM field is assumed to be a...
Plane Electromagnetic Waves II
Consider a plane wavefront traveling in position x-direction with a constant speed. This wavefront can be utilized to obtain the relationship between electric and magnetic fields with the help of Faraday's law.
Standing Electromagnetic Waves
Electromagnetic waves can be reflected; the surface of a conductor or a dielectric can act as a reflector. As electric and magnetic fields obey the superposition principle, so do electromagnetic waves. The superposition of an incident wave and a reflected electromagnetic wave produces a standing wave analogous to the standing waves created on a stretched string.
Suppose a sheet of a perfect conductor is placed in the yz-plane, and a linearly polarized electromagnetic wave traveling in the...
Suppose a sheet of a perfect conductor is placed in the yz-plane, and a linearly polarized electromagnetic wave traveling in the...
Electronic Distance Measuring Instruments
Electronic Distance Measuring Instruments (EDMs) are essential tools in modern surveying, offering precise distance measurements by emitting electromagnetic signals and calculating the time required for these signals to travel to a target and return. Two primary types of signals are used in EDMs — light waves and microwaves — each suited to specific environmental and distance requirements. Light-wave-based EDMs utilize either infrared or laser light, providing high accuracy over short distances...
Types of Global Positioning System Surveys
GPS surveying methods vary in application, accuracy, and data collection techniques, catering to diverse surveying and mapping needs. Static GPS, kinematic GPS, and real-time kinematic (RTK) surveying are widely used. Each technique offers distinct advantages.Static GPS involves placing one receiver at a known reference point and another at the target point. It collects exact positional data by observing multiple satellite ranges over an extended period, achieving centimeter-level accuracy for...

