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Astronomy Picture of the Day -- Alpha Centauri: The Closest Star System
NASA ^ | July 03, 2011 | (see photo credit)

Posted on 07/03/2011 10:34:44 AM PDT by SunkenCiv

Explanation: The closest star system to the Sun is the Alpha Centauri system. Of the three stars in the system, the dimmest -- called Proxima Centauri -- is actually the nearest star. The bright stars Alpha Centauri A and B form a close binary as they are separated by only 23 times the Earth- Sun distance - slightly greater than the distance between Uranus and the Sun. In the above picture, the brightness of the stars overwhelm the photograph causing an illusion of great size, even though the stars are really just small points of light. The Alpha Centauri system is not visible in much of the northern hemisphere. Alpha Centauri A, also known as Rigil Kentaurus, is the brightest star in the constellation of Centaurus and is the fourth brightest star in the night sky. Sirius is the brightest even thought it is more than twice as far away. By an exciting coincidence, Alpha Centauri A is the same type of star as our Sun, causing many to speculate that it might contain planets that harbor life.

July 03, 2011

(Excerpt) Read more at 129.164.179.22 ...


TOPICS: Astronomy; Astronomy Picture of the Day; Science
KEYWORDS: alphacentauri; alphacentauria; alphacentaurib; apod; astronomy; science; xplanets
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[Credit: 1-Meter Schmidt Telescope, ESO]

1 posted on 07/03/2011 10:34:48 AM PDT by SunkenCiv
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To: brytlea; cripplecreek; decimon; bigheadfred; KoRn; Grammy; married21; steelyourfaith; Mmogamer; ...

Star Trek's fictional planet Vulcan orbits Alpha C. BTW, solved the kitty graphic problem.

2 posted on 07/03/2011 10:38:43 AM PDT by SunkenCiv (It's the Obamacare, stupid! -- Thanks Cincinna for this link -- http://www.friendsofitamar.org)
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To: SunkenCiv
solved the kitty graphic problem

Ohhhh...my apologies...

3 posted on 07/03/2011 10:49:11 AM PDT by bigheadfred ( He put... creatures... in our bodies... to control our minds.)
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To: SunkenCiv

Slightly more than half of Sun-like stars (stars more or less equivalent in size/brightness to the Sun) located in our galaxy are multiple star systems, i.e. two or more stars.


4 posted on 07/03/2011 10:51:35 AM PDT by Signalman
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To: SunkenCiv

I hate to rain on your parade and demonstrate the absolute waste of brainspace within my own skull, but the Centuarans are their own species. The Vulcans are found around the star 40 Eridani A.


5 posted on 07/03/2011 10:52:32 AM PDT by redpoll
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To: redpoll; SunkenCiv
I hate to rain on your parade...

The Vulcans are found around the star 40 Eridani A.

Not anymore. The home planet was destroyed.

6 posted on 07/03/2011 11:03:41 AM PDT by bigheadfred ( He put... creatures... in our bodies... to control our minds.)
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To: redpoll

But Zefram Cochrane WAS from Alpha Cent, no matter what, so called, Captn Pickard said.


7 posted on 07/03/2011 11:05:48 AM PDT by Conan the Librarian (The Best in Life is to crush my enemies, see them driven before me, and the Dewey Decimal System)
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To: bigheadfred

I thought they had to go back to Vulcan when they went into rut?

Freegards


8 posted on 07/03/2011 11:08:57 AM PDT by Ransomed
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To: bigheadfred

Don’t worry Jim Kirk will save the universe again.


9 posted on 07/03/2011 11:28:03 AM PDT by Steve Van Doorn (*in my best Eric cartman voice* 'I love you guys')
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To: Ransomed

Nah. Theycandoit anywhere 2 or more are gathered.


10 posted on 07/03/2011 11:29:27 AM PDT by bigheadfred ( He put... creatures... in our bodies... to control our minds.)
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To: Ransomed
I thought they had to go back to Vulcan when they went into rut?

Naw, they sneak over to the planet where the hot green chicks come from.......Vulcans are logical about their rutting to.

11 posted on 07/03/2011 11:38:46 AM PDT by The Cajun (Palin, Free Republic, Mark Levin, Rush, Hannity......Nuff said.)
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To: SunkenCiv

I wish I had a 1-meter scope.

-

We should have launched craft that direction years ago.
Ya never know, it might get there.. eventually. :-)

Alpha Centauri Should Harbor Detectable, Earth-Like Planets
http://www.sciencedaily.com/releases/2008/03/080307121613.htm

ScienceDaily (Mar. 7, 2008) — A rocky planet similar to Earth may be orbiting one of our nearest stellar neighbors and could be detected using existing techniques, according to a new study led by astronomers at the University of California, Santa Cruz.


12 posted on 07/03/2011 11:39:38 AM PDT by NormsRevenge (Semper Fi ... Godspeed .. Monthly Donor Onboard .. Obama: Epic Fail or Bust!!!)
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To: bigheadfred

That’s much more convenient. I looked it up, Theodore Sturgeon wrote “the Amok Time”. I think “Killdozer” is one of the best novella sci-fi stories ever.

Freegards


13 posted on 07/03/2011 11:40:24 AM PDT by Ransomed
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To: Ransomed

I have Killdozer somewhere around here. In one of those complilation books. I haven’t read that for a while. Might as well give it another go.


14 posted on 07/03/2011 11:54:30 AM PDT by bigheadfred ( He put... creatures... in our bodies... to control our minds.)
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To: SunkenCiv; bigheadfred

Our nearest neighbor, and they never even stopped by to borrow a cup of sugar, or even to say hello. Sigh... Alien races are so insular these days.

Hi Fred!


15 posted on 07/03/2011 12:30:04 PM PDT by TheOldLady (FReepmail me to get ON or OFF the ZOT LIGHTNING ping list.)
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To: bigheadfred

Killdozer! has a lot of his own experiences on the merchant marine and construction jobs in the pacific, if I recall. He goes into lots of details about the machines.

So sturgeon and Jack Vance(my favourite) were both in the merchant marine. Jack vance actually wrote a lot of the “Dying Earth” on ship.

Freegards


16 posted on 07/03/2011 12:33:43 PM PDT by Ransomed
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To: TheOldLady
they never even stopped by

Prolly really for the best.

Might be like feeding a stray cat.

17 posted on 07/03/2011 12:37:18 PM PDT by bigheadfred ( He put... creatures... in our bodies... to control our minds.)
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To: bigheadfred

Indeed. I know how that goes.


18 posted on 07/03/2011 12:44:01 PM PDT by TheOldLady (FReepmail me to get ON or OFF the ZOT LIGHTNING ping list.)
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To: Ransomed

I don’t think I have an all out favorite. Always liked Niven. Pournelle.


19 posted on 07/03/2011 12:48:10 PM PDT by bigheadfred ( He put... creatures... in our bodies... to control our minds.)
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To: bigheadfred

Pournelle and Niven are great(Mote,Ringworld(I think that is just Niven),legacy of Hereot are my favs), but for me it is Jack Vance and Gene Wolfe and then everyone else.

Pournelle on Vance, from the blurb on the back of “Throy”: “You can’t possibly pass up any book by Jack Vance...He has perfected the trick of creating new worlds so deceptively real that after a while your own home seems imaginary.”

Freegards


20 posted on 07/03/2011 1:14:03 PM PDT by Ransomed
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