If you need a quick way to create simple diagrams, Gliffy is it. Even if your job has nothing to do with graphic design, chances are you still have to produce the occasional diagram. Whether you’re ...

When creating presentation materials, web pages, etc., it is convenient to have a diagram that summarizes the contents in an easy-to-understand manner. There are many tools for creating diagrams, some ...

Horizontal lines run left to right, parallel to the horizon, with slope 0 and equation y = k. Vertical lines run top to bottom, perpendicular to the horizon, with undefined slope and equation x = k.

A simple diagram, which celebrates its centennial this year, continues to serve as the most essential conceptual tool in stellar astrophysics Modern astronomy paints a vivid picture of the universe ...