spacer
 
Advanced Search
Astrobiology Magazine Facebook  Astrobiology Magazine Twitter
MyCn18: An Hourglass Planetary Nebula
08/07/11
The sands of time are running out for the central star of this hourglass-shaped planetary nebula. With its nuclear fuel exhausted, this brief, spectacular, closing phase of a Sun-like star's life occurs as its outer layers are ejected - its core becoming a cooling, fading white dwarf. In 1995, astronomers used the Hubble Space Telescope (HST) to make a series of images of planetary nebulae, including the one above. Here, delicate rings of colorful glowing gas (nitrogen-red, hydrogen-green, and oxygen-blue) outline the tenuous walls of the hourglass. The unprecedented sharpness of the HST images has revealed surprising details of the nebula ejection process that are helping to resolve the outstanding mysteries of the complex shapes and symmetries of planetary nebulas. Credit: R. Sahai and J. Trauger (JPL), WFPC2, HST, NASA
MyCn18: An Hourglass Planetary Nebula
Add to My Astro


 

Previous | 791-800 | 801-810 | 811-820 | 821-830 | 831-840 | 841-850 | 851-860 | 861-870 | 871-880 | 881-890 | 891-900 | Next  

 

 

 

About Us
Contact Us
Links
Sitemap
Podcast Rss Feed
Daily News Story RSS Feed
Latest News Story RSS Feed
Learn more about RSS
Chief Editor & Executive Producer: Helen Matsos
Copyright © 2014, Astrobio.net