The Stingray Nebula: It is the youngest known planetary nebula, formed by a star rapidly turning into a white dwarf. During the process, it releases gas and dust into space. The Crab Nebula ...

Originally thought to be a supernova remnant for more than a decade after its discovery, this object is now known to be a planetary nebula ... to spot through an 8-inch telescope unless sky ...

Stars like the sun end their lives as highly compact white dwarfs, but as they shrink down into this phase they release clouds of gas which form a so-called "planetary nebula". This is a rather ...