関連する実験動画
Updated: Jul 12, 2026
10:35
Bringing the Visible Universe into Focus with Robo-AO
Published on: February 12, 2013
まとめ
ユリセスの宇宙船は,
科学分野:
- 惑星科学は惑星科学である.
- 宇宙物理学 宇宙物理学
- マグネトヒドロダイナミクス
背景:
- 過去のミッションでは,木星の磁気圏と磁場を研究した.
- ユリセスのミッションは,以前の発見を確認し,拡張することを目的とした.
- 木星の高緯度の黄昏磁気圏の探査は,新しい目的でした.
研究 の 目的:
- 以前の木星の磁気圏と磁場の研究を確認し,補完するために.
- 木星の磁気圏とその境界地帯の高緯度の夕暮れ側を探索するために.
- 電流システムの磁気圏構成への影響を分析する.
主な方法:
- ユリセス宇宙船が木星を横断飛行した際の磁場測定.
- 磁気圏の昼側と暮れ側からのデータの分析.
- ユリセスのデータと以前のミッションのデータとの比較.
主要な成果:
- 昼側の磁気圏の一般的な構造が確認されました.
- 中部および外部の磁気圏における現在のシートダイナミクスの重要な役割を強調した.
- 観測された磁場は,夕暮れ側にある磁気尾の方向に後退した.
- アジムタルとフィールドに整合した電流システムの重要性を強調した.
- 木星の内部惑星のフィールドに重大な変化は見つかりませんでした.
- 指示された木星のモデルは,現在のシート強度,構造,および時間依存性に敏感です.
- 磁気圏の境界や境界層の複雑な微細構造を明らかにした.
- 検出された波や波のような構造,長時間持続するミラーモードの波列車を含む.
結論:
- 木星の磁気圏のモデルは,現在のシート特性と動力学に基づいて精細化する必要があります.
- 現在のシステムは木星の磁気圏の形成に重要な役割を果たしています.
- 磁気圏の境界は複雑な微細構造を示し,波の活動が著しく観察されています.
関連する概念動画
01:19Magnetic Field Lines
The representation of magnetic fields by magnetic field lines is very useful in visualizing the strength and direction of the magnetic field. Each of the magnetic field lines forms a closed loop. The field lines emerge from the north pole (N), loop around to the south pole (S), and continue through the bar magnet back to the north pole.
Magnetic field lines follow several hard-and-fast rules:
Magnetic field lines follow several hard-and-fast rules:
01:16Magnetic Field Of A Current Loop
Consider a circular loop with a radius a, that carries a current I. The magnetic field due to the current at an arbitrary point P along the axis of the loop can be calculated using the Biot-Savart law.
01:25Magnetic Field due to Moving Charges
A stationary charge creates and interacts with the electric field, while a moving charge creates a magnetic field.
Consider a point charge moving with a constant velocity. Like the electric field, the magnetic field at any point is directly proportional to the magnitude of the charge and inversely proportional to the square of the distance between the source point and the field point. However, unlike the electric field, the magnetic field is always perpendicular to the plane containing the line...
Consider a point charge moving with a constant velocity. Like the electric field, the magnetic field at any point is directly proportional to the magnitude of the charge and inversely proportional to the square of the distance between the source point and the field point. However, unlike the electric field, the magnetic field is always perpendicular to the plane containing the line...
01:18Magnetic Field of a Solenoid
A solenoid is a conducting wire coated with an insulating material, wound tightly in the form of a helical coil. The magnetic field due to a solenoid is the vector sum of the magnetic fields due to its individual turns. Therefore, for an ideal solenoid, the magnetic field within the solenoid is directly proportional to the number of turns per unit length and the current. Conversely, the magnetic field outside the solenoid is zero.
Consider a solenoid with 100 turns wrapped around a cylinder of...
Consider a solenoid with 100 turns wrapped around a cylinder of...
01:27Magnetic Field Due To A Thin Straight Wire
Consider an infinitely long straight wire carrying a current I. The magnetic field at point P at a distance a from the origin can be calculated using the Biot-Savart law.
01:19Magnetic Declination
Magnetic declination is the angle between true north, which aligns with the Earth's rotational axis, and magnetic north, which follows the direction of the Earth's magnetic field. This discrepancy exists because the magnetic poles do not coincide with the geographic poles. The value of magnetic declination depends on the observer's location on Earth and is subject to changes over time due to the dynamic nature of the Earth's magnetic field.The declination is called eastern when magnetic north...