General Coordinates Network (GCN) web site

Calculate phase of the moon using Julian date

Astronomy/weather clock

The most comprehensive collection of accurate astronomical algorithms in JavaScript (TypeScript).

Simulation of the Prague Astronomical Clock for any location on Earth.

Astronomy Picture of the Day (APOD) Chrome Extension for the new tab screen

Jelajahi alam semesta dengan gambar dan video astronomi yang luar biasa berbeda setiap harinya dengan penjelasan dari para pakar astronomi.

Provides web-based star charts and astronomical information.

observerly's lightweight, zero-dependency, type safe astrometry library written in TypeScript. This library can be used to ascertain to positions of the Sun, Moon and the planets, as well as ascertain transit times for any astronomical object.

Realtime dashboard of NASA/JPL communication with interplanetary spacecraft, made with Svelte.

A WebGL-based renderer for procedural generation of Earth-like planets

Astronomy FITS Viewer & Analysis Tool in the browser

Asteroids 🪨 that will make a close approach by Earth 🌏 today

observerly's Edge runtime API of stars, galaxies and other astronomical bodies, adhering to the OpenAAS standard.

Plugin for Obsidian to add the current Julian Date for astronomical observations

Telegram Bot NASA

The graphing tool for various astronomy curricula at UNC Chapel Hill and beyond.

Brand new graphing tool for Skynet

An interactive map of the Solar System

Polaris is a fully tree-shakeable zero-dependency Typescript library for performing astrometric and astronomical calculations.