Some 2,000 light-years from Earth, an elderly star has ejected its puffy outer layers to form a luminous, jewel-like ball of gas. Set aglow by ultraviolet radiation pouring out from the core of the ...

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 ...