Tuesday, June 29, 2010

Mesr 2: Horse head nebula

The Horsehead Nebula is one of the most famous nebulae on the sky. The horse-head feature is dark because it is really an opaque dust cloud that lies in front of the bright red emission nebula. Like clouds in Earth's atmosphere, this cosmic cloud has assumed a recognizable shape by chance. After many thousands of years, the internal motions of the cloud will alter its appearance. The emission nebula's red color is caused by electrons recombining with protons to form hydrogen atoms. Also visible in the picture are blue reflection nebulae that preferentially reflect the blue light from nearby stars.

1 comment:

  1. OH, Thanks again:) And for explaining this so expressively! I appreciate you greatly. I also love the world of physics, even though I never was able to appreciate the math without foreknowledge of what my future was to hold. But , it's a blessing to meet people as yourself to easily expound their{your} knowledge in such a simple way, yet not loosing the order of it's given coplexities.I look forward to my next lesson!:) Your same friend in nature and space, Nancy baldonadonancy@gmail.com