a4d61c872a
This caused me to discover I had forgotten to finish making the necessary changes to astronomy.ts for saving the cartesian vector inside the EquatorialCoordinates class. I also realized I had made a mistake in the documentation for the y-coordinate of the vector: it is the June solstice; there is no such thing as a September solstice! Also fixed some mistakes in demo tests: if something failed, I was printing out the wrong filename (camera.c instead of camera.cs).
JavaScript examples for Node.js
The source file
astronomy.js
works as a Node.js module. Download the file into your project directory.
Then in your own source file, do this:
const Astronomy = require('astronomy.js');
or install the package with npm i astronomy-engine and:
import { SearchMoonQuarter } from 'astronomy-engine';
There are no external dependencies!
Astronomy Engine is completely self-contained, and it always will be.
(By the way, you can use the same file astronomy.browser.js for
astronomy calculations inside the browser.)
Culmination
Finds when the Sun, Moon, and planets reach their highest position in the sky on a given date, as seen by an observer at a specified location on the Earth. Culmination is also the moment a body crosses the meridian, the imaginary semicircle in the sky that passes from due north on the horizon, through the zenith (straight up), and then toward due south on the horizon.
Horizon Intersection
This is a more advanced example. It shows how to use coordinate transforms to find where the ecliptic intersects with an observer's horizon at a given date and time.
Lunar Eclipse
Calculates details about the first 10 partial/total lunar eclipses after the given date and time.
Moon Phase Calculator
This example shows how to determine the Moon's current phase, and how to predict when the next few quarter phases will occur.
Positions
Calculates equatorial and horizontal coordinates of the Sun, Moon, and planets.
Rise/Set
Shows how to calculate sunrise, sunset, moonrise, and moonset times.
Seasons
Calculates the equinoxes and solstices for a given calendar year.
API Reference
Complete documentation for all the functions and types available in the JavaScript version of Astronomy Engine.