The Spirograph Nebula gets its name from the microstructure inside the spherical nebula. Anyone who played with that toy will remember the fascinating designs it made using ellipses. IC 418’s double ...
In 1965, there was one Spirograph set. Today, there are over 30 different sets to choose from. You can even buy a set that ...
For the first time, the famous “spirograph” Planetary Nebula IC418’s non-explosive stellar evolution has been captured over an unprecedented period of 130 years—almost double the length of a typical ...