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Diana Sparrow
Lives in New York, NY
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Diana Sparrow

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Chandra Flashback of the Day – NGC 2392: A Beautiful End to a Star’s Life
http://chandra.si.edu/photo/2013/ngc2392/
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Diana Sparrow

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Question of the Day!
Is it possible for the existence of an 'anti-dark matter?' It was long predicted for the existence of anti-matter in theory so it seems plausible to me. 

Answer!
It depends on what dark matter is. If it is slow moving dark particles as many theorists predict, I would assume there would be anti-particles. However, we would then have to explain why there are so many more dark matter particles than anti-dark matter particles (the same problem we are faced with for matter and anti-matter) or explain where the anti particles are hidden.

For more information on the dark matter mystery, please visit the X-ray Field Guide on dark matter:
http://chandra.harvard.edu/xray_astro/dark_matter.html 
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Question of the Day!
What kinds of stars are there? How big are stars? Who are some famous people who studied stars? 

Answer!
Stellar evolution of different kinds of stars There are many different kinds of stars: normal stars like our Sun, huge red stars called red giants, small hot white stars called white dwarfs, small cool brown stars called brown dwarfs, and more. The following pages describe normal stars like the Sun:
http://chandra.harvard.edu/xray_sources/normal_stars.html 

The next set of web pages contain information on the life cycle of stars, and page 3 has a useful image with the different types of stars listed on it:
http://chandra.harvard.edu/xray_sources/stellar_evolution.html 

The size of stars varies greatly - they can have diameters from less than 12 miles across to more than 500 times the diameter of the Sun. One of the famous people who studied stars is Annie Jump Cannon, an American astronomer born in 1863 who studied stars and discovered hundreds of variable stars (stars with changing brightness) - many of the others are listed on this page:
http://cnr2.kent.edu/~manley/astronomers.html 
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Diana Sparrow

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How much do you know about the different wavelengths of light? Check out this infographic on the subject. You may learn something new! Larger Version: http://chandra.harvard.edu/resources/illustrations/infographics.html
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Diana Sparrow

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only music in genres : Pop, Europop, Euro disco, Latin pop, dance-pop, pop rock, blue-eyed soul, jazz, house
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