Video Experimental Relacionado
Updated: Aug 4, 2026
06:04
Simulation of the Planetary Interior Differentiation Processes in the Laboratory
Published on: November 15, 2013
Origen de los asteroides de varios kilómetros que cruzan la Tierra y Marte: una simulación cuantitativa
Migliorini1, Michel, Morbidelli
1F. Migliorini, Armagh Observatory, College Hill BT61 9DG, Northern Ireland, United Kingdom, and Osservatorio Astronomico di Torino, I-10025 Pino Torinese, Italy. P. Michel, Osservatorio Astronomico di Torino, I-10025 Pino Torinese, Italy, and Obse.
Science (New York, N.Y.)
|September 25, 1998
Resumen
Las resonancias débiles empujan lentamente a los asteroides del cinturón principal hacia órbitas que cruzan con Marte. Muchos de ellos se convierten en asteroides que cruzan la Tierra, lo que explica las poblaciones observadas.
Área de la Ciencia:
- Ciencias planetarias Ciencias planetarias.
- La Dinámica Orbital es una Dinámica Orbital.
- Investigación de asteroides Investigación de asteroides.
Sus antecedentes:
- Las poblaciones de asteroides en el cinturón principal y el espacio cercano a la Tierra son de gran interés.
- Comprender las trayectorias dinámicas de los asteroides es crucial para la evaluación del peligro de impacto.
Objetivo del estudio:
- Para investigar los mecanismos dinámicos que impulsan a los asteroides desde el cinturón principal hasta las órbitas que cruzan Marte y la Tierra.
- Explicar cuantitativamente el número observado de asteroides que cruzan Marte (MCAs) y de asteroides que cruzan la Tierra (ECAs).
Principales métodos:
- Utilizó simulaciones dinámicas orbitales.
- Analizó los efectos de las resonancias de movimiento medio débil en los elementos orbitales de los asteroides.
- Rastreó las transiciones de asteroides desde el cinturón principal a las trayectorias que cruzan Marte y la Tierra.
Principales resultados:
- Numerosas resonancias débiles de movimiento medio aumentan gradualmente la elipticidad orbital del asteroide.
- Los asteroides son conducidos eficientemente desde el cinturón principal a las órbitas que cruzan Marte.
- Aproximadamente el 50% de los asteroides que cruzan Marte pasan a órbitas que cruzan la Tierra en 20 millones de años.
Conclusiones:
- La evolución orbital simulada explica cuantitativamente las poblaciones observadas de grandes asteroides que cruzan la Tierra y Marte.
- Las resonancias débiles juegan un papel crítico en poblar el espacio cercano a la Tierra con asteroides originados en el cinturón principal.
Videos de Conceptos Relacionados
02:06Conditions on Early Earth
Around 4 billion years ago, oceans began to condense on earth while volcanic eruptions released nitrogen, carbon dioxide, methane, ammonia, and hydrogen into the primordial atmosphere. However, organisms with the characteristics of life were not initially present on earth. Scientists have used experimentation to determine how organisms evolved that could grow, reproduce, and maintain an internal environment.
02:06Conditions on Early Earth
Around 4 billion years ago, oceans began to condense on earth while volcanic eruptions released nitrogen, carbon dioxide, methane, ammonia, and hydrogen into the primordial atmosphere. However, organisms with the characteristics of life were not initially present on earth. Scientists have used experimentation to determine how organisms evolved that could grow, reproduce, and maintain an internal environment.
01:15Elastic Collisions: Case Study
Elastic collision of a system demands conservation of both momentum and kinetic energy. To solve problems involving one-dimensional elastic collisions between two objects, the equations for conservation of momentum and conservation of internal kinetic energy can be used. For the two objects, the sum of momentum before the collision equals the total momentum after the collision. An elastic collision conserves internal kinetic energy, and so the sum of kinetic energies before the collision equals...
01:24Acceleration due to Gravity on Other Planets
The gravitational acceleration of an object near the Earth's surface is called the acceleration due to gravity. It can be measured by conducting simple experiments on Earth. However, such an experiment is impossible to conduct on the surface of other planets.
Astronomical observations are thus used to measure the acceleration due to gravity on other planets. This can be determined by observing the effect of a planet's gravity on objects close to it. The crucial factor that helps in this...
Astronomical observations are thus used to measure the acceleration due to gravity on other planets. This can be determined by observing the effect of a planet's gravity on objects close to it. The crucial factor that helps in this...
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,...
01:12Reduced Mass Coordinates: Isolated Two-body Problem
In classical mechanics, the two-body problem is one of the fundamental problems describing the motion of two interacting bodies under gravity or any other central force. When considering the motion of two bodies, one of the most important concepts is the reduced mass coordinates, a quantity that allows the two-body problem to be solved like a single-body problem. In these circumstances, it is assumed that a single body with reduced mass revolves around another body fixed in a position with an...