関連する実験動画
Updated: Jul 27, 2026
16:31
Echo Particle Image Velocimetry
Published on: December 27, 2012
彗星シューメイカー・レヴィ9号の衝突で発生した大気現象のHST画像
H B Hammel1, R F Beebe, A P Ingersoll
1Department of Earth, Atmospheric, and Planetary Sciences, Massachusetts Institute of Technology, Cambridge 02139.
Science (New York, N.Y.)
|March 3, 1995
まとめ
ハッブル宇宙望遠鏡は,彗星シューメイカー・レヴィ9が木星に衝突することを観測し,大気の変化と羽根活動の大幅な変化を明らかにした. これらの観測は,彗星衝突が惑星の大気に及ぼす影響に関するユニークな洞察を提供した.
科学分野:
- 惑星科学は惑星科学である.
- 天文学 天文学
- 彗星科学 彗星科学
背景:
- 彗星シューメイカー・レヴィ9号と木星の衝突は,重要な天文学的出来事でした.
- 衝突に対する惑星の大気反応を理解することは極めて重要です.
研究 の 目的:
- 彗星シューメイカー・レヴィ9号が木星に衝突した時の大気効果を分析する.
- 衝突地点の進化と木星の外観を記録する.
主な方法:
- ハッブル宇宙望遠鏡 (HST) の画像を利用した.
- 観測された羽根の動力学,射出速度,大気波.
- 衝突時間を予測と比較した.
主要な成果:
- 観測された羽根は,速度10km/sで3000kmに達する.
- 454 m/sの速度で移動する大気波が検出されました.
- 衝突のタイミングと潜在的なボライドの検出における不一致を指摘した.
結論:
- ハッブル望遠鏡の画像は,木星の大気の変化を記録した.
- このイベントは,彗星衝突の動態と惑星の反応に関する貴重なデータを提供しました.
関連する概念動画
03:40Hess's Law
There are two ways to determine the amount of heat involved in a chemical change: measure it experimentally, or calculate it from other experimentally determined enthalpy changes. Some reactions are difficult, if not impossible, to investigate and make accurate measurements for experimentally. And even when a reaction is not hard to perform or measure, it is convenient to be able to determine the heat involved in a reaction without having to perform an experiment.
02:39Emission Spectra
When solids, liquids, or condensed gases are heated sufficiently, they radiate some of the excess energy as light. Photons produced in this manner have a range of energies, and thereby produce a continuous spectrum in which an unbroken series of wavelengths is present.
01:20Atomic Emission Spectroscopy: Overview
Atomic emission spectroscopy (AES) is an analytical technique used to determine the elemental composition of a sample by analyzing the light emitted from excited atoms. In AES, atoms in a sample are excited to higher energy levels by thermal energy from high-temperature sources, such as plasma, arcs, or sparks. When these excited atoms return to lower energy states, they emit light at specific wavelengths characteristic of each element. The resulting atomic emission spectrum, which consists of...
01:22Atomic Emission Spectroscopy: Instrumentation
The instrumentation of atomic emission spectrometry (AES) involves various components, including atomization devices that convert samples into gas-phase atoms and ions. There are two main types of atomization devices: continuous and discrete atomizers. Continuous atomizers, like plasmas and flames, introduce samples in a constant stream, while discrete atomizers inject individual samples using syringes or autosamplers. The most common discrete atomizer is the electrothermal atomizer.
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,...
01:29Atomic Emission Spectroscopy: Lab
AES is a powerful analytical technique, especially effective when used with plasma sources, producing abundant spectra in characteristic emission lines. The Inductively Coupled Plasma (ICP), in particular, yields superior quantitative analytical data due to its high stability, low noise, low background, and minimal interferences under optimal experimental conditions. However, newer air-operated microwave sources are emerging as promising alternatives that could be more cost-effective than...