|
|||||||
|
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) Read More |
January 2010: There really isn’t much to say about January. The days were in the 20’s & the nights in the single digits. The weather was gray & gloomy. Typical. Except for the lack of snow. All the precipitation went south of us, WAY south into Maryland. The skiers & sledders are none-too-pleased, that is for [...] Let’s see … The Problem with the Holidays, is that everything is put off until time allows & time dost-not-often allow. Trying to Remember November is like waking from a night’s sleep, stiff from dreaming too much, with only vague images indicating that you were dreaming at all. Good thing I took pictures. That puts some of it together [...] |
||||||
|
Copyright © 2010 Crowhill Creations Blog Site - All Rights Reserved - Web site maintained by Ravens'Song at CroehillCreations.com |
|||||||
