The Ring Nebula is the sky’s most famous example of a planetary nebula ... Seeing the white dwarf requires a large aperture, transparent skies, and steady seeing. Without all three, it will ...

The jug-like structure is a rare and short-lived double-lobed planetary nebula. The stellar wreckage left by the death throes of a giant red star takes the appearance of an overflowing cosmic jug ...

Forbes contributors publish independent expert analyses and insights. I focus on the intersection of games and technology. This representative-color picture taken by the Hubble Space Telescope ...

as well as bringing to light a rich background of stars and galaxies. Planetary nebulae actually have nothing to do with planets – they are so-named because when they were first discovered in ...

The planetary nebula ... lines coming from the nebula’s excited hydrogen. By contrast, Hewett 1 was identified by emission lines from oxygen in the spectra of many background galaxies and ...