Home 
Cancer
Cancer
Cancer
|
Images of the Day
| A Chameleon Sky | ||
 | ||
| The sands of time are running out for the central star of this the Hourglass 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 and its core becomes a cooling, fading white dwarf. In 1995, astronomers used the Hubble Space Telescope 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 Hubble's images revealed surprising details of the nebula ejection process and may resolve the outstanding mystery of the variety of complex shapes and symmetries of planetary nebulae. Image Credit: NASA, WFPC2, HST, R. Sahai and J. Trauger (JPL)... | ||
| 02 Sep 2010 | ||
| 800x600 | 1024x768 | Large |
Search
Popular Articles
- what is a blog?
- Celebrating MLK with a Day of Service
- Dasa System in Vedic Astrology - Part 2 - Transition Periods Between Dasas
- What Matters in a Good Logo Design?
- The Popularity of Chat Forums
- Build Your Business Through Forum Marketing - Part 1
- The Seven C’s Of Success
- Saturn & Neptune: Money and Oil
){kind=link}
){kind=link}
){kind=link}