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Brady Yoon
2004-Feb-15, 05:52 AM
my dad was wondering about this-since white dwarves are made out of mostly carbon, could they be related in any way to diamonds here on earth?

gbaikie
2004-Feb-15, 12:09 PM
"As it cools, the carbon atoms will crystallize into diamond lattice, a single diamond with a mass equal to 300,000 times the entire Earth!"
http://astro.nmsu.edu/~nicole/teaching/ASTR110/lectures/lecture24/slide03.html
Now, that is a big rock:)

WaggaWaggaGuy
2004-Feb-15, 12:12 PM
Snow white had seven of them didn't she.. and they'd be of a carbon-based life form?

Oh, time to search for more beer..

Charlie in Dayton
2004-Feb-16, 07:04 AM
Sometimes coincidence is just too tame a term...

Astronomers Find A Huge Diamond In Space (http://www.universetoday.com/am/publish/huge_diamond_space.html)

etLux
2004-Feb-16, 07:31 AM
Sometimes coincidence is just too tame a term...

Astronomers Find A Huge Diamond In Space (http://www.universetoday.com/am/publish/huge_diamond_space.html)

From the above article:

"The white dwarf studied by Metcalfe, Montgomery, and Antonio Kanaan (UFSC Brazil), is not only radiant but also harmonious. It rings like a gigantic gong, undergoing constant pulsations.

"'By measuring those pulsations, we were able to study...' [etc.]"

I've read similar statements before, and wondered about them: Of what type of "pulsations" are they actually speaking? Acoustic? If so, how are they detected?

Kaptain K
2004-Feb-16, 07:46 AM
Doppler shift.

Hamlet
2004-Feb-16, 03:51 PM
Sometimes coincidence is just too tame a term...

Astronomers Find A Huge Diamond In Space (http://www.universetoday.com/am/publish/huge_diamond_space.html)

From the above article:

"The white dwarf studied by Metcalfe, Montgomery, and Antonio Kanaan (UFSC Brazil), is not only radiant but also harmonious. It rings like a gigantic gong, undergoing constant pulsations.

"'By measuring those pulsations, we were able to study...' [etc.]"

I've read similar statements before, and wondered about them: Of what type of "pulsations" are they actually speaking? Acoustic? If so, how are they detected?

From Doppler Shift.

Here (http://www.astronomynotes.com/starsun/s5.htm) is a link that explains a little about techniques used to measure pulsations in the Sun. I would guess that similar techniques are used for other stars.

Glom
2004-Feb-16, 04:07 PM
Damn you for beating me to it. I found this (http://news.bbc.co.uk/1/hi/sci/tech/3492919.stm) from BBCi.

etLux
2004-Feb-16, 04:40 PM
Ah! Thank you for relieving my ignorance -- I should have thought of that.

I'd been having visions of a giant parabolic reflector with a great big microphone sticking out at the focus... lol.