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Possibility of planets in Alpha Centauri star system

 
Anonymous Coward
User ID: 1240281
Croatia
01/23/2011 05:54 AM
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Possibility of planets in Alpha Centauri star system
The discovery of planets orbiting other star systems, including similar binary systems (Gamma Cephei), raises the possibility that planets may exist in the Alpha Centauri system. Such planets could orbit Alpha Centauri A or Alpha Centauri B individually, or be on large orbits around the binary Alpha Centauri AB. Since both the principal stars are fairly similar to the Sun (for example, in age and metallicity), astronomers have been especially interested in making detailed searches for planets in the Alpha Centauri system. Several established planet-hunting teams have used various radial velocity or star transit methods in their searches around these two bright stars. All the observational studies have so far failed to find any evidence for brown dwarfs or gas giant planets.

However, computer simulations show that a planet might have been able to form within a distance of 1.1 AU (160 million km) of Alpha Centauri B and the orbit of that planet may remain stable for at least 250 million years. Bodies around A would be able to orbit at slightly farther distances due to A's stronger gravity. In addition, the lack of any brown dwarfs or gas giants around A and B make the likelihood of terrestrial planets greater than otherwise. Currently, technologies do not allow for terrestrial planets like Earth to be detected around Alpha Centauri.

Alpha Centauri is envisioned as the first target for unmanned interstellar exploration. Crossing the huge distance between the Sun and Alpha Centauri using current spacecraft technologies would take several millennia[citation needed], though the possibility of space sail, or Nuclear Pulse Fusion technology may cut this down to a matter of decades.

You can find more on :

[link to en.wikipedia.org]

What do you think, ladies and gentelmen?
Anonymous Coward
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01/23/2011 05:58 AM
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Re: Possibility of planets in Alpha Centauri star system
Cool. One can only hope.
Anonymous Coward (OP)
User ID: 1240281
Croatia
01/23/2011 06:02 AM
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Re: Possibility of planets in Alpha Centauri star system
Yup, I hope they found a world like Pandora.
ºº SPOT ºº

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01/23/2011 06:03 AM
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Re: Possibility of planets in Alpha Centauri star system
Crossing the huge distance between the Sun and Alpha Centauri using current spacecraft technologies would take several millennia[citation needed], though the possibility of space sail, or Nuclear Pulse Fusion technology may cut this down to a matter of decades.
 Quoting: Anonymous Coward 1240281

I don't see how space sail and nuclear-powered ship can cut down on travelling time.

They may last longer but not faster.
I'm smarter than a rock
Anonymous Coward
User ID: 1109530
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01/23/2011 06:05 AM
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Re: Possibility of planets in Alpha Centauri star system
What about proxima centauri which is closer
Anonymous Coward (OP)
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01/23/2011 06:06 AM
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Re: Possibility of planets in Alpha Centauri star system
I recently read that NASA is working on Nuclear Propulsion Technology, that if made possible, could power the ship to the speed of 0.1c. That would take only 40 years to reach Alpha Centauri.
Mitheriel

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01/23/2011 06:28 AM
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Re: Possibility of planets in Alpha Centauri star system
I was depressed when scientists started finding planets around nearby Stars, because I had heard no mention of Alpha Centari, though its closer than the other systems and has the Star that is closest to our Sun.
It would be choice, if there was a planet there capable of sustaining life, that had yet to evolve intelligent life or humanoid species, so its resources could be easily exploited without the necessity for Warmongering Earthlings to go there and wipe them out or enslave them, when we build our Empire of the Stars. Provided of course that it hasen't already been stripped clean by foreign E.T. encroachment.
Its probably a trap.
Anonymous Coward (OP)
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01/23/2011 06:30 AM
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Re: Possibility of planets in Alpha Centauri star system
What about proxima centauri which is closer
 Quoting: Anonymous Coward 1109530



The TV documentary Alien Worlds hypothesized that a life-sustaining planet could exist in orbit around Proxima Centauri or other red dwarf stars. Such a planet would lie within the habitable zone of Proxima Centauri, about 0.023–0.054 AU from the star, and would have an orbital period of 3.6–14 days. A planet orbiting within this zone will experience tidal locking to the star, so that Proxima Centauri moves little in the planet's sky, and most of the surface experiences either day or night perpetually. However, the presence of an atmosphere could serve to redistribute the energy from the star-lit side to the far side of the planet.

Proxima Centauri's flare outbursts could erode the atmosphere of any planet in its habitable zone, but the documentary's scientists thought that this obstacle could be overcome (see continued theories). Gibor Basri of the University of California, Berkeley, even mentioned that "no one [has] found any showstoppers to habitability." For example, one concern was that the torrents of charged particles from the star's flares could strip the atmosphere off any nearby planet. However, if the planet had a strong magnetic field, the field would deflect the particles from the atmosphere; even the slow rotation of a tidally locked dwarf planet that spins once for every time it orbits its star would be enough to generate a magnetic field, as long as part of the planet's interior remained molten.

Other scientists, especially proponents of the Rare Earth hypothesis, disagree that red dwarf stars can sustain life. The tide-locked rotation may result in a relatively weak planetary magnetic moment, leading to strong atmospheric erosion by coronal mass ejections from Proxima Centauri.

More on:

[link to en.wikipedia.org]
Ultra Red

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01/23/2011 06:33 AM
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Re: Possibility of planets in Alpha Centauri star system
I recently read that NASA is working on Nuclear Propulsion Technology, that if made possible, could power the ship to the speed of 0.1c. That would take only 40 years to reach Alpha Centauri.
 Quoting: Anonymous Coward 1240281


Accelerate at 1g for half way and Decelerate for the other half.
Wouldn't take long...
Anonymous Coward (OP)
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01/23/2011 07:19 AM
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Re: Possibility of planets in Alpha Centauri star system
I recently read that NASA is working on Nuclear Propulsion Technology, that if made possible, could power the ship to the speed of 0.1c. That would take only 40 years to reach Alpha Centauri.
 Quoting: Anonymous Coward 1240281


Accelerate at 1g for half way and Decelerate for the other half.
Wouldn't take long...
 Quoting: Ultra Red


LOL, you would feel very "heavy" all the way.
Ultra Red

User ID: 1026222
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01/23/2011 07:30 AM
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Re: Possibility of planets in Alpha Centauri star system
I recently read that NASA is working on Nuclear Propulsion Technology, that if made possible, could power the ship to the speed of 0.1c. That would take only 40 years to reach Alpha Centauri.
 Quoting: Anonymous Coward 1240281


Accelerate at 1g for half way and Decelerate for the other half.
Wouldn't take long...
 Quoting: Ultra Red


LOL, you would feel very "heavy" all the way.
 Quoting: Anonymous Coward 1240281

But at least one could walk about normally, drink from a cup and not suffer muscle loss and other symptoms of weightlessness!
Anonymous Coward
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01/23/2011 10:56 AM
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Re: Possibility of planets in Alpha Centauri star system
I recently read that NASA is working on Nuclear Propulsion Technology, that if made possible, could power the ship to the speed of 0.1c. That would take only 40 years to reach Alpha Centauri.
 Quoting: Anonymous Coward 1240281

NASA has been working on nuclear propulsion on and off since 1960, yep, that long.

I was wondering when some one was going to bring up the Centauri Star System in the quest for extra-Solar planets.
Anonymous Coward
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01/23/2011 10:57 AM
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Re: Possibility of planets in Alpha Centauri star system
I recently read that NASA is working on Nuclear Propulsion Technology, that if made possible, could power the ship to the speed of 0.1c. That would take only 40 years to reach Alpha Centauri.
 Quoting: Anonymous Coward 1240281


Accelerate at 1g for half way and Decelerate for the other half.
Wouldn't take long...
 Quoting: Ultra Red


LOL, you would feel very "heavy" all the way.
 Quoting: Anonymous Coward 1240281

Totally incorrect. You would not feel very 'heavy' at all at 1 gee you would weigh the same amount you do on Earth, and you would feel your weight in the same way as you do on Earth. After all on Earth you are constantly in a 1 Gee gravitational field.
Anonymous Coward
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01/23/2011 10:58 AM
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Re: Possibility of planets in Alpha Centauri star system
Anonymous Coward
User ID: 1144159
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01/23/2011 11:02 AM
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Re: Possibility of planets in Alpha Centauri star system
I was depressed when scientists started finding planets around nearby Stars, because I had heard no mention of Alpha Centari, though its closer than the other systems and has the Star that is closest to our Sun.
It would be choice, if there was a planet there capable of sustaining life, that had yet to evolve intelligent life or humanoid species, so its resources could be easily exploited without the necessity for Warmongering Earthlings to go there and wipe them out or enslave them, when we build our Empire of the Stars. Provided of course that it hasen't already been stripped clean by foreign E.T. encroachment.
Its probably a trap.
 Quoting: Mitheriel

Remind me of a sci-fi novel I have, "Flying to Vallahala".

We don't even know what it is to 'fly' to Mars yet.

I wonder, if you travel out far enough will you fall off the edge of the universe? "Thar be monsters, thar". I can still hear the Flat Universers and the Hollow Universers making their claims.

A generation lost in space, that's what going to the Centauri system would be all about, truely a one way mission without 'warp drive'.
Anonymous Coward
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01/23/2011 11:38 AM
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Re: Possibility of planets in Alpha Centauri star system
Hang out at 5757 Wayne Newton, Las Vegas, NV with a large sign saying, "Alpha Centauri, political asylum!" Will have you there in about 20 hours.
Uggs

User ID: 1032222
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01/23/2011 11:42 AM
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Re: Possibility of planets in Alpha Centauri star system
Quick! Send a probe to find out!
Anonymous Coward (OP)
User ID: 1240281
Croatia
01/24/2011 07:51 AM
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Re: Possibility of planets in Alpha Centauri star system

I was wondering when some one was going to bring up the Centauri Star System in the quest for extra-Solar planets.
 Quoting: Anonymous Coward 1240281


Yeah, they are talking about systems that are 20, 50 or 100 light years away. Maybe they should look closer.
Anonymous Coward (OP)
User ID: 1240281
Croatia
01/24/2011 07:53 AM
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Re: Possibility of planets in Alpha Centauri star system

Totally incorrect. You would not feel very 'heavy' at all at 1 gee you would weigh the same amount you do on Earth, and you would feel your weight in the same way as you do on Earth. After all on Earth you are constantly in a 1 Gee gravitational field.
 Quoting: Anonymous Coward 1240281


Not sure, but I thing that accelerating at 1g is not a pleasant experience wether you have weigh or not.
Strangeways

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01/24/2011 08:11 AM
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Re: Possibility of planets in Alpha Centauri star system
I recently read that NASA is working on Nuclear Propulsion Technology, that if made possible, could power the ship to the speed of 0.1c. That would take only 40 years to reach Alpha Centauri.
 Quoting: Anonymous Coward 1240281

They'd need to build stasis systems so they can put travellers into deep sleep.
We are but eternal spiritual beings living a temporary human experience.
Anonymous Coward (OP)
User ID: 1240281
Croatia
01/24/2011 08:21 AM
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Re: Possibility of planets in Alpha Centauri star system
I recently read that NASA is working on Nuclear Propulsion Technology, that if made possible, could power the ship to the speed of 0.1c. That would take only 40 years to reach Alpha Centauri.
 Quoting: Anonymous Coward 1240281

They'd need to build stasis systems so they can put travellers into deep sleep.
 Quoting: Strangeways


Yeah, something like cryo-sleep in Avatar. That would be cool.
Anonymous Coward
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01/24/2011 08:29 AM
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Re: Possibility of planets in Alpha Centauri star system
We may be able to visit other planets, but we will never breathe the air... our immune systems are tuned for earth. we would die within days from their equivalent of an throat tickle. Micro-organisms FTL.
Anonymous Coward
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Bulgaria
03/18/2013 12:07 PM
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Re: Possibility of planets in Alpha Centauri star system
Tell me more about this possibility ,pls
biscamelot@gmail.com
Hang out at 5757 Wayne Newton, Las Vegas, NV with a large sign saying, "Alpha Centauri, political asylum!" Will have you there in about 20 hours.
 Quoting: Anonymous Coward 1157934

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