Next Generation Science Standards

NGSS-MS-ESS1-1 Develop and use a model of the Earth-sun-moon system to describe the cyclic patterns of lunar phases, eclipses of the sun and moon, and seasons.

NGSS-HS-ESS1-4 Use mathematical or computational representations to predict the motion of orbiting objects in the solar system.

NGSS-MS-ETS1-1. Define the criteria and constraints of a design problem with sufficient precision to ensure a successful solution, taking into account relevant scientific principles and potential impacts on people and the natural environment that may limit possible solutions.

NGSS-MS-ETS1-2. Evaluate competing design solutions using a systematic process to determine how well they meet the criteria and constraints of the problem.

NGSS-MS-ETS1-3. Analyze data from tests to determine similarities and differences among several design solutions to identify the best characteristics of each that can be combined into a new solution to better meet the criteria for success.MS-ETS1-4. Develop a model to generate data for iterative testing and modification of a proposed object, tool, or process such that an optimal design can be achieved.

NGSS-MS-ETS1-4. Develop a model to generate data for iterative testing and modification of a proposed object, tool, or process such that an optimal design can be achieved.

// Part: Earth

function earth(){

movie = video();

movie.source = "night-stars.mp4";

this.shadow = tint("black",0);

// Purpose: be lit or shaded

this.dim = function(perc){

this.shadow.amount = perc;

}

}

// Part: Sun

function sun(x,y) {

this.x = x;

this.y = y;

this.body = circle(this.x,this.y, 100, "#eff28c", "clear");

this.label = text("sun",this.x-40, this.y-40);

this.label.color = "#1d0c7b";

this.corona = blur(0);

// Purpose: totality

this.total = function(){

mySun.body.radius = 110;

this.corona.amount = 20;

}

// Purpose: partiality

this.partial = function(){

mySun.body.radius = 100;

this.corona.amount = 0;

}

}

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//Part: Moon

function moon(x,y) {

this.body = circle(x,y,100, "blue", "clear");

this.label = text("moon");

this.label.y = y-40;

this.label.color = "white";

// Purpose: transit

this.goto = function(x){

this.body.x = x;

this.label.x = x-60;

}

}

// Instantiate parts

var myEarth = new earth();

var mySun = new sun(300,150);

var myMoon = new moon(0,150);

// Complexities

repeat(function() {

// The Moon is controlled by the mouse

myMoon.goto(mouse.x)

// The amount the Earth is lit depends on the positions of the Sun and

Moon

myEarth.dim(100 - Math.abs(myMoon.body.x-mySun.body.x)/2);

// If the Sun and Moon are lined up, we have a total eclipse

if (myMoon.body.x === mySun.body.x){

mySun.total();

}

else{

mySun.partial();

}

}, 1);