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One Hundred Billion Trillion Habitable Planets
Centauri Dreams ^ | 2/17/09

Posted on 02/17/2009 12:15:35 PM PST by LibWhacker

Alan Boss, whose new book The Crowded Universe will soon be on my shelves (and reviewed here), has driven the extrasolar planet story to the top of the news with a single statement. Speaking at the American Association for the Advancement of Science’s annual meeting in Chicago, Boss (Carnegie Institution, Washington) said that the number of Earth-like planets in the universe might be the same as the number of stars, a figure he pegged at one hundred billion trillion.

A universe teeming with life? Inevitably. The Telegraph quoted Boss on the matter in an early report on his presentation:

“If you have a habitable world and let it evolve for a few billion years then inevitably some sort of life will form on it,” said Dr Boss.

“It is sort of running an experiment in your refrigerator - turn it off and something will grow in there.

“It would be impossible to stop life growing on these habitable planets.”

Few Centauri Dreams readers would disagree with the notion that life may be common in the universe, but what about intelligent life leading to technology? That’s a far greater challenge, and Boss notes that our own civilization will be unlikely to exist in another 100,000 years. The odds on our running into another civilization at roughly the same stage of development are vanishingly small. Let’s see what Kepler finds. The planet-hunter lifts off in a scant three weeks on a mission Boss believes will find a habitable terrestrial planet within four years. How we would accomplish the unmanned mission to study this world that Boss refers to is something we continue to speculate about on Centauri Dreams.

Apropos of Boss’ comments, our man in the maritime antipodes, Paul Titze, sends along this memorable quotation from Christiaan Huygens, who wrote of these matters in 1695:

What a wonderful and amazing Scheme have we here of the magnificent Vastness of the Universe! So many Suns, so many Earths, and every one of them stock’d with so many Herbs, Trees and Animals, and adorn’d with so many Seas and Mountains! And how must our wonder and admiration be increased when we consider the prodigious distance and multitude of the Stars?



TOPICS: Astronomy; Science
KEYWORDS: 100sextillion; habitable; planets; universe; xplanets
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To: LibWhacker
Planet 51
21 posted on 02/17/2009 12:31:47 PM PST by SolidRedState (Someone finally found a spine and it is attached to an Alaskan Governor!)
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To: LibWhacker
In 1950, while working at Los Alamos National Laboratory, the physicist Enrico Fermi had a casual conversation while walking to lunch with colleagues Emil Konopinski, Edward Teller and Herbert York. The men lightly discussed a recent spate of UFO reports and an Alan Dunn cartoon facetiously blaming the disappearance of municipal trashcans on marauding aliens. They then had a more serious discussion regarding the chances of humans observing faster-than-light travel of some material object within the next ten years, which Teller put at one in a million, but Fermi put closer to one in ten. The conversation shifted to other subjects, until during lunch Fermi suddenly exclaimed, "Where are they?" (alternatively, "Where is everybody?") One participant recollects that Fermi then made a series of rapid calculations using estimated figures (Fermi was known for his ability to make good estimates from first principles and minimal data...) According to this account, he then concluded that Earth should have been visited long ago and many times over.

Fermi's Paradox: http://en.wikipedia.org/wiki/Fermi_paradox

Where are they?

22 posted on 02/17/2009 12:33:25 PM PST by Captain Rhino (The best way to calm the delusions of grandeur in the energy cartel is to stop needing their energy)
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To: LibWhacker
I don't want one of my refrigerators punished with life.
23 posted on 02/17/2009 12:35:18 PM PST by agere_contra (So ... where's the birth certificate?)
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To: LibWhacker

One hundred billion trillion habitable planets...and the left had to pick THIS one!


24 posted on 02/17/2009 12:41:49 PM PST by Oldpuppymax (AGENDA OF THE LEFT EXPOSED)
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To: Wyatt's Torch
How did I know someone was going to post old Helen?

Don't worry. I'm most certain the population on my planet will look like this:


25 posted on 02/17/2009 12:43:10 PM PST by Retired Greyhound
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To: Captain Rhino

Not enough data to come to a conclusion.....


26 posted on 02/17/2009 12:47:27 PM PST by Brett66 (Where government advances, and it advances relentlessly , freedom is imperiled -Janice Rogers Brown)
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To: LibWhacker

No one is out there.


27 posted on 02/17/2009 12:56:42 PM PST by Norman Bates
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To: LibWhacker
Star Trek T shirt Pictures, Images and Photos
28 posted on 02/17/2009 12:57:02 PM PST by Snickering Hound
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To: LibWhacker
The Dimocrats will immediately start a plan to begin taxing these planets. They will begin by promising that the tax will only be $1 per planet and WILL NEVER effect the poor.
29 posted on 02/17/2009 12:58:12 PM PST by SampleMan (I'm not drinking the kool aid! Is it 2013 yet?)
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To: Captain Rhino

I thought Fermi’s Paradox, or at least part of it, was about why the night sky was dark.


30 posted on 02/17/2009 1:00:13 PM PST by Norman Bates
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To: SolidRedState

That looks pretty good.


31 posted on 02/17/2009 1:03:50 PM PST by wolfcreek (There is no 2 party system only arrogant Pols and their handlers)
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To: LibWhacker
One Hundred Billion Trillion

That number assumes that the universe is finite

32 posted on 02/17/2009 1:03:54 PM PST by clamper1797 (Obambi ... Karl Marx in black face)
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To: gorush

If there are that many inhabitable planets then even if only a tiny fraction developed intelligent life that would still be a great deal of planets. Where are all the signals of intelligent civilization then? We should be bombarded with radio waves shot off from long extinct, not so long extint, and even perhaps a few still extant civilizations. The silence is deafening.


33 posted on 02/17/2009 1:05:51 PM PST by Norman Bates
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To: LibWhacker

Well come on lets get out and settle a few of them. I call Geidi Prime.


34 posted on 02/17/2009 1:05:57 PM PST by utherdoul
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To: clamper1797

I would assume it is finite. Beyond the crest of ever-expanding matter is nothing (i.e., darkness).


35 posted on 02/17/2009 1:08:42 PM PST by Norman Bates
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To: LibWhacker

Yeah, well, on one of them, the Denuvian Slime World, where is is forever twilight, bobbing in an irregular orbit in a three-star system, there are insectoid people who reproduce by binary fission, amuse themselves by playing croquet with cast-off body parts, and stand on their heads for centuries at a time. And even they think Dennis Kucinich is weird.


36 posted on 02/17/2009 1:19:01 PM PST by Billthedrill
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To: Norman Bates
Beyond the crest of ever-expanding matter is nothing

Or the outer boundary of the neighboring oscillating universe

37 posted on 02/17/2009 1:20:18 PM PST by clamper1797 (Obambi ... Karl Marx in black face)
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To: Billthedrill

“Yeah, well, on one of them, the Denuvian Slime World...insectoid people...even they think Dennis Kucinich is weird.”

Lol at that!


38 posted on 02/17/2009 1:26:03 PM PST by Texan Tory
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To: Norman Bates
We should be bombarded with radio waves shot off from long extinct, not so long extint, and even perhaps a few still extant civilizations. The silence is deafening.

I had a little idea about that: if you were on the moon, and pointed a sufficiently sensitive antenna towards the Earth, and tuned to Channel Two on the TV... you'd get random noise, because you'd be getting all the separate Channel Twos in the hemisphere facing you at once. So maybe the alien signals are there but in such quantity that they're interfering with each other and mutually masking their non-random nature.

39 posted on 02/17/2009 1:26:05 PM PST by Grut
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To: LibWhacker

If my math is correct, one hunded billion trillion = 10 to the 23rd power. Or 1 followed by 23 zeros. With an estimate this imprecise, I’m wondering if it’s based on Avogadro’s number (6.022 x 10 to the 23rd) = number of atoms in a mole.


40 posted on 02/17/2009 1:27:34 PM PST by NTHockey (Rules of engagement #1: Take no prisoners.)
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