行星绕天体公转系统总机械能怎么算
时间: 2023-04-01 08:01:50 浏览: 152
行星绕天体公转系统总机械能可以通过行星和天体的势能和动能之和来计算。具体公式为:总机械能=势能+动能,其中势能= -GmM/r,动能=1/2mv²,G为万有引力常数,m为行星或天体的质量,M为另一天体的质量,r为行星或天体与另一天体的距离,v为行星或天体的速度。
相关问题
threejs 八大行星公转自转
以下是使用Three.js实现八大行星公转自转的代码示例:
```javascript
// 创建场景
var scene = new THREE.Scene();
// 创建相机
var camera = new THREE.PerspectiveCamera(75, window.innerWidth / window.innerHeight, 0.1, 1000);
camera.position.z = 50;
// 创建渲染器
var renderer = new THREE.WebGLRenderer();
renderer.setSize(window.innerWidth, window.innerHeight);
document.body.appendChild(renderer.domElement);
// 创建太阳
var sunGeometry = new THREE.SphereGeometry(10, 32, 32);
var sunMaterial = new THREE.MeshBasicMaterial({ color: 0xffff00 });
var sun = new THREE.Mesh(sunGeometry, sunMaterial);
scene.add(sun);
// 创建八大行星
var mercuryGeometry = new THREE.SphereGeometry(1, 32, 32);
var mercuryMaterial = new THREE.MeshBasicMaterial({ color: 0x888888 });
var mercury = new THREE.Mesh(mercuryGeometry, mercuryMaterial);
mercury.position.x = 20;
scene.add(mercury);
var venusGeometry = new THREE.SphereGeometry(2, 32, 32);
var venusMaterial = new THREE.MeshBasicMaterial({ color: 0xff8800 });
var venus = new THREE.Mesh(venusGeometry, venusMaterial);
venus.position.x = 30;
scene.add(venus);
var earthGeometry = new THREE.SphereGeometry(3, 32, 32);
var earthMaterial = new THREE.MeshBasicMaterial({ color: 0x0000ff });
var earth = new THREE.Mesh(earthGeometry, earthMaterial);
earth.position.x = 40;
scene.add(earth);
var marsGeometry = new THREE.SphereGeometry(2, 32, 32);
var marsMaterial = new THREE.MeshBasicMaterial({ color: 0xff0000 });
var mars = new THREE.Mesh(marsGeometry, marsMaterial);
mars.position.x = 50;
scene.add(mars);
var jupiterGeometry = new THREE.SphereGeometry(6, 32, 32);
var jupiterMaterial = new THREE.MeshBasicMaterial({ color: 0xffcc00 });
var jupiter = new THREE.Mesh(jupiterGeometry, jupiterMaterial);
jupiter.position.x = 70;
scene.add(jupiter);
var saturnGeometry = new THREE.SphereGeometry(5, 32, 32);
var saturnMaterial = new THREE.MeshBasicMaterial({ color: 0xcc9900 });
var saturn = new THREE.Mesh(saturnGeometry, saturnMaterial);
saturn.position.x = 90;
scene.add(saturn);
var uranusGeometry = new THREE.SphereGeometry(4, 32, 32);
var uranusMaterial = new THREE.MeshBasicMaterial({ color: 0x00ffff });
var uranus = new THREE.Mesh(uranusGeometry, uranusMaterial);
uranus.position.x = 110;
scene.add(uranus);
var neptuneGeometry = new THREE.SphereGeometry(3, 32, 32);
var neptuneMaterial = new THREE.MeshBasicMaterial({ color: 0x000099 });
var neptune = new THREE.Mesh(neptuneGeometry, neptuneMaterial);
neptune.position.x = 130;
scene.add(neptune);
// 创建光源
var light = new THREE.PointLight(0xffffff, 1, 0);
light.position.set(0, 0, 0);
scene.add(light);
// 动画循环
function animate() {
requestAnimationFrame(animate);
// 太阳自转
sun.rotation.y += 0.01;
// 水星公转自转
mercury.rotation.y += 0.01;
mercury.position.x = 20 * Math.cos(Date.now() * 0.0005);
mercury.position.z = 20 * Math.sin(Date.now() * 0.0005);
// 金星公转自转
venus.rotation.y += 0.01;
venus.position.x = 30 * Math.cos(Date.now() * 0.0004);
venus.position.z = 30 * Math.sin(Date.now() * 0.0004);
// 地球公转自转
earth.rotation.y += 0.01;
earth.position.x = 40 * Math.cos(Date.now() * 0.0003);
earth.position.z = 40 * Math.sin(Date.now() * 0.0003);
// 火星公转自转
mars.rotation.y += 0.01;
mars.position.x = 50 * Math.cos(Date.now() * 0.0002);
mars.position.z = 50 * Math.sin(Date.now() * 0.0002);
// 木星公转自转
jupiter.rotation.y += 0.01;
jupiter.position.x = 70 * Math.cos(Date.now() * 0.0001);
jupiter.position.z = 70 * Math.sin(Date.now() * 0.0001);
// 土星公转自转
saturn.rotation.y += 0.01;
saturn.position.x = 90 * Math.cos(Date.now() * 0.00005);
saturn.position.z = 90 * Math.sin(Date.now() * 0.00005);
// 天王星公转自转
uranus.rotation.y += 0.01;
uranus.position.x = 110 * Math.cos(Date.now() * 0.00003);
uranus.position.z = 110 * Math.sin(Date.now() * 0.00003);
// 海王星公转自转
neptune.rotation.y += 0.01;
neptune.position.x = 130 * Math.cos(Date.now() * 0.00002);
neptune.position.z = 130 * Math.sin(Date.now() * 0.00002);
renderer.render(scene, camera);
}
animate();
```
CSS3九大行星绕太阳周转动画效果
以下是使用 CSS3 实现的九大行星绕太阳周转的动画效果:
HTML代码:
```html
<div class="sun"></div>
<div class="mercury"></div>
<div class="venus"></div>
<div class="earth"></div>
<div class="mars"></div>
<div class="jupiter"></div>
<div class="saturn"></div>
<div class="uranus"></div>
<div class="neptune"></div>
```
CSS代码:
```css
.sun {
width: 200px;
height: 200px;
border-radius: 50%;
background-color: #f9d71c;
position: absolute;
top: 50%;
left: 50%;
transform: translate(-50%, -50%);
z-index: 1;
box-shadow: 0 0 50px #f9d71c, 0 0 100px #f9d71c, 0 0 150px #f9d71c, 0 0 200px #f9d71c;
animation: rotate-sun 10s linear infinite;
}
.mercury {
width: 20px;
height: 20px;
border-radius: 50%;
background-color: #b5b5b5;
position: absolute;
top: 50%;
left: 50%;
transform: translate(-50%, -50%) translateX(70px);
animation: rotate-mercury 3s linear infinite;
}
.venus {
width: 35px;
height: 35px;
border-radius: 50%;
background-color: #f2b02e;
position: absolute;
top: 50%;
left: 50%;
transform: translate(-50%, -50%) translateX(120px);
animation: rotate-venus 5s linear infinite;
}
.earth {
width: 40px;
height: 40px;
border-radius: 50%;
background-color: #3a7cff;
position: absolute;
top: 50%;
left: 50%;
transform: translate(-50%, -50%) translateX(160px);
animation: rotate-earth 8s linear infinite;
}
.mars {
width: 25px;
height: 25px;
border-radius: 50%;
background-color: #ff4f4f;
position: absolute;
top: 50%;
left: 50%;
transform: translate(-50%, -50%) translateX(200px);
animation: rotate-mars 10s linear infinite;
}
.jupiter {
width: 80px;
height: 80px;
border-radius: 50%;
background-color: #c05c3c;
position: absolute;
top: 50%;
left: 50%;
transform: translate(-50%, -50%) translateX(300px);
animation: rotate-jupiter 20s linear infinite;
}
.saturn {
width: 70px;
height: 70px;
border-radius: 50%;
background-color: #d8c58e;
position: absolute;
top: 50%;
left: 50%;
transform: translate(-50%, -50%) translateX(400px);
animation: rotate-saturn 30s linear infinite;
}
.uranus {
width: 60px;
height: 60px;
border-radius: 50%;
background-color: #6ecfff;
position: absolute;
top: 50%;
left: 50%;
transform: translate(-50%, -50%) translateX(500px);
animation: rotate-uranus 40s linear infinite;
}
.neptune {
width: 55px;
height: 55px;
border-radius: 50%;
background-color: #3456a9;
position: absolute;
top: 50%;
left: 50%;
transform: translate(-50%, -50%) translateX(600px);
animation: rotate-neptune 50s linear infinite;
}
@keyframes rotate-sun {
0% {
transform: rotate(0deg);
}
100% {
transform: rotate(360deg);
}
}
@keyframes rotate-mercury {
0% {
transform: rotate(0deg);
}
100% {
transform: rotate(360deg);
}
}
@keyframes rotate-venus {
0% {
transform: rotate(0deg);
}
100% {
transform: rotate(360deg);
}
}
@keyframes rotate-earth {
0% {
transform: rotate(0deg);
}
100% {
transform: rotate(360deg);
}
}
@keyframes rotate-mars {
0% {
transform: rotate(0deg);
}
100% {
transform: rotate(360deg);
}
}
@keyframes rotate-jupiter {
0% {
transform: rotate(0deg);
}
100% {
transform: rotate(360deg);
}
}
@keyframes rotate-saturn {
0% {
transform: rotate(0deg);
}
100% {
transform: rotate(360deg);
}
}
@keyframes rotate-uranus {
0% {
transform: rotate(0deg);
}
100% {
transform: rotate(360deg);
}
}
@keyframes rotate-neptune {
0% {
transform: rotate(0deg);
}
100% {
transform: rotate(360deg);
}
}
```
解释一下代码:
1. `.sun` 代表太阳,使用 `border-radius: 50%` 将其设置为圆形,使用 `box-shadow` 添加光晕效果,使用 `animation` 添加旋转动画。
2. `.mercury` 到 `.neptune` 分别代表九大行星,使用不同的颜色、大小、位置和旋转速度等属性,使用 `animation` 添加旋转动画。
3. `@keyframes` 定义了动画执行的关键帧,从 `0%` 开始,旋转角度为 `0deg`,到 `100%` 结束,旋转角度为 `360deg`。
4. 通过设置 `translateX` 属性实现行星的位置偏移,从而实现绕太阳周转的效果。
这样就可以实现九大行星绕太阳周转的动画效果了。