Video Experimental Relacionado
Updated: Aug 15, 2026
09:44
Laboratory Drop Towers for the Experimental Simulation of Dust-aggregate Collisions in the Early Solar System
Published on: June 5, 2014
Las partículas de escombros de impacto en la estratosfera de Júpiter
R A West1, E Karkoschka, A J Friedson
1Earth and Space Sciences Division, California Institute of Technology, Pasadena 91109.
Science (New York, N.Y.)
|March 3, 1995
Resumen
Los impactos del cometa Shoemaker-Levy 9 en Júpiter crearon aerosoles orgánicos oscuros, ricos en azufre y nitrógeno. La coagulación de las partículas explica el aerosol.
Área de la Ciencia:
- Ciencias planetarias Ciencias planetarias.
- La astronomía es la astronomía.
- Ciencia de los Cometas Ciencia de los Cometas
Sus antecedentes:
- El cometa periódico Shoemaker-Levy 9 impactó con Júpiter.
- El Telescopio Espacial Hubble (HST) observó las secuelas.
Objetivo del estudio:
- Analizar la composición y las propiedades físicas de los escombros de impacto.
- Comprender la evolución del aerosol después del impacto.
Principales métodos:
- Utilizada cámara planetaria de amplio campo 2 (WFPC2) en el HST.
- Análisis de datos espectrales para determinar las propiedades de las partículas.
Principales resultados:
- Las partículas de desechos de impacto son de color marrón oscuro, ricas en azufre y nitrógeno.
- El volumen de aerosoles alcanzó una esfera de 0,5 km de radio 1 día después del impacto.
- El radio medio de las partículas es de 0,15-0,3 μm en regiones de espesor óptico (1-200 mbar).
Conclusiones:
- Material orgánico probablemente responsable del color de las partículas.
- Los modelos de coagulación de partículas explican la evolución observada de los aerosoles durante un mes.
Videos de Conceptos Relacionados
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...
01:16Precipitate Formation and Particle Size Control
In precipitation gravimetry, the precipitating agent should react specifically or selectively with the analyte. While a specific reagent reacts with the analyte alone, a selective reagent can react with a limited number of chemical species.
The obtained precipitate should be either a pure substance of known composition or easily converted to one by a simple process, such as ignition or drying. In addition, the precipitate should be insoluble and easily filterable. In general, filterability...
The obtained precipitate should be either a pure substance of known composition or easily converted to one by a simple process, such as ignition or drying. In addition, the precipitate should be insoluble and easily filterable. In general, filterability...
01:12Precipitation Processes
The experimental conditions in a gravimetric analysis should be optimized to maximize the particle size and purity of the obtained precipitate. Ideally, the concentration of the precipitating reagent should be low with effective stirring to maintain low relative supersaturation for the growth of large crystals. In homogeneous precipitation, the precipitant is slowly generated by a chemical reaction in the solution to avoid local reagent excesses. For example, urea decomposes gradually to...
01:25Atomic Absorption Spectroscopy: Atomization Methods
Atomic Absorption Spectroscopy (AAS) atomizes samples through flame atomization or electrothermal atomization. Flame atomization typically involves a nebulizer and spray chamber assembly to combine the sample with a fuel–oxidant mixture, creating a fine aerosol mist that enters a burner. Typically, the fuel and oxidant are combined in an approximately stoichiometric ratio. However, for atoms that are easily oxidized, a fuel-rich mixture may be more advantageous. Only about 5% of the aerosol...
01:30Atomic Emission Spectroscopy: Interference
In atomic emission spectroscopy (AES), high-temperature atomizers excite a broad range of elements and molecules that generate complex emissions from sources such as oxides, hydroxides, and flame combustion products in the flame or plasma. Several strategies can be employed to minimize spectral interferences caused by overlapping emission lines or bands. These include increasing instrument resolution, choosing alternative emission lines, optimally placing the detector in low-background regions,...
01:31Planes in Space
A plane in three-dimensional space is fundamentally characterized by a point that lies on the plane and a normal vector that is perpendicular to its surface. This normal vector uniquely determines the orientation of the plane, making it an essential geometric descriptor. In architectural applications, such as the installation of a sloped glass panel on a building façade, this mathematical model provides a precise representation of the panel’s position and orientation in space.Let r₀ be the...