Interactive Solar System

Original prompt

Build an interactive animated Solar System visualization.

Include:
- the Sun
- all eight planets
- planetary orbits
- Earth's Moon
- several major moons of Jupiter
- relative orbital speeds
- orbital trails
- pause/resume
- adjustable simulation speed
- zoom and pan
- clicking a planet to inspect it
- switching between a Solar System view and a selected-planet view

Moons must continue orbiting their parent planet correctly while the planet itself moves around the Sun.

Changing simulation speed must not cause objects to jump or lose orbital state.

Chinese translation

构建一个交互式太阳系动画可视化。包含太阳、八大行星、行星轨道、地球月球、木星若干主要卫星、相对轨道速度和轨迹显示。支持暂停/继续、调整模拟速度、缩放和平移、点击行星查看信息，以及在太阳系视图和选中行星视图之间切换。卫星必须在母行星绕太阳运动的同时继续正确围绕母行星运行；改变模拟速度时，各天体不得瞬移或丢失轨道状态。

Expected outcome

The deliverable should use hierarchical coordinates and one coherent simulation clock. Moon positions should derive from a moving parent planet plus local satellite orbits. Pause, speed changes, and camera-mode switching must not reset orbital phase. Visual scale may be non-physical for readability, but structural and motion relationships should remain coherent.

Additional verification guidance

• Observe Earth's Moon and Jupiter's moons over time and verify they orbit moving parent planets.
• Change simulation speed repeatedly during motion and confirm continuous positions, preserved phase, and no orbital jumps.
• Test pause/resume, zoom, pan, planet selection, and view switching and confirm interactions do not corrupt simulation state.
• Verify that all eight planets, orbits, labels, and trails remain legible across viewports with acceptable performance.