Images of two iconic planetary nebulae taken by the Hubble Space Telescope are revealing new information about how they develop their dramatic features Researchers from Rochester Institute of ...

NGC 6891 is a bright, asymmetrical planetary nebula in the constellation Delphinus, the Dolphin. This Hubble image reveals a wealth of structure, including a spherical outer halo that is expanding ...

Images of two iconic planetary nebulae taken by the Hubble Space Telescope are revealing new information about how they develop their dramatic features. Researchers from Rochester Institute of ...

To understand how long a planetary nebula remains visible, we first need to understand why a planetary nebula is visible at all. When a solar-type star (one with a mass of 0.8 to eight times that of ...

A huge bar of iron has been discovered lurking inside the iconic Ring Nebula. The structure is enormous, spanning hundreds of times the size of Pluto’s orbit and containing a Mars-sized amount of iron ...

How long do planetary nebulae last on average? What are some of the controlling factors? Doug Kaupa Council Bluffs, Iowa To understand how long a planetary nebula remains visible, we first need to ...