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[Space] Found! Potentially Earth-Like Planet at Proxima Centauri Is Closest Ever - Page 3

post #21 of 100
Quote:
Originally Posted by Dienz View Post

In our galaxy, there is an estimated 200 to 400 billion stars. If just 1% of those had at least 1 planet, and just 1% of those planets were capable of supporting life as we know it and just 1% of that life was an intelligent race, that still leaves 200,000 to 400,000 potential alien civilizations; or at the very least Earth-like planets where life could exist.

Extraterrestrial life must exist. I personally find the thought that our planet is the only one with life on it totally absurd. How? With so many galaxies and so many stars and the potential for so many life-bearing worlds, how can ours be unique?

Edit: What I said is pretty much a direct quote but I can't remember who said it... I think Neil deGrasse Tyson. Regardless of who said it, it's a remarkable idea that there could possibly be that many alien civilizations or habitable planets.
If there is 1 other habitable planet within the galaxy and we manage to get there, that brings our survival rate up to 2x. A 100% increase in survival performance (it's what we're after on OCN) is staggering! Going from Titan X to Titan XP only gave us 50% avg performance increase.
post #22 of 100
Quote:
Originally Posted by mouacyk View Post

If there is 1 other habitable planet within the galaxy and we manage to get there, that brings our survival rate up to 2x. A 100% increase in survival performance (it's what we're after on OCN) is staggering! Going from Titan X to Titan XP only gave us 50% avg performance increase.

Yeah, getting there.

4.2 LY, right in our backyard, right next door! Let's hop in our space cruiser and head out!

New Horizons was the fastest thing humans have launched, about 36K MPH (after it got up to speed). Let's bump it up to 50K MPH, we're well further advanced than we were when that relic launched.

That'll get us to Proxima A in what, 55,000 years? Our backyard, right next door! Oh, and then you will have to figure out how to stop at Proxima, not just whiz right on by like New Horizons did at Pluto. Using 30 years per generation, you are looking at over 1800 generations or we can use our awesome new cryo-hibernation technology and just suspend the travelers for 55 centuries. What? we don't have that new cryo-hibernation technology up and running yet? Well, we'll just go faster! What? That'll make it just that much harder to stop when we get there?

Habitable zone. Earth and Venus are both in the "habitable zone". It's a little less hospitable on Venus, daytime temps in the balmy 850°F range with atmospheric pressure over 1300 psi. It would be a real bummer to travel for 50 thousand years and find Venus waiting for you.
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post #23 of 100
Quote:
Originally Posted by GnarlyCharlie View Post

Yeah, getting there.

4.2 LY, right in our backyard, right next door! Let's hop in our space cruiser and head out!

New Horizons was the fastest thing humans have launched, about 36K MPH (after it got up to speed). Let's bump it up to 50K MPH, we're well further advanced than we were when that relic launched.

That'll get us to Proxima A in what, 55,000 years? Our backyard, right next door! Oh, and then you will have to figure out how to stop at Proxima, not just whiz right on by like New Horizons did at Pluto. Using 30 years per generation, you are looking at over 1800 generations or we can use our awesome new cryo-hibernation technology and just suspend the travelers for 55 centuries. What? we don't have that new cryo-hibernation technology up and running yet? Well, we'll just go faster! What? That'll make it just that much harder to stop when we get there?

Habitable zone. Earth and Venus are both in the "habitable zone". It's a little less hospitable on Venus, daytime temps in the balmy 850°F range with atmospheric pressure over 1300 psi. It would be a real bummer to travel for 50 thousand years and find Venus waiting for you.


Not going to spend humans , tiny robot spaceships instead. I read a thing about it the other week in the news, guy reckons they can build a giant laser on earth and use it to push these tiny robots up to 0.2% of light speed which would get them to this planet in twenty years. Obviously they won't be able to slow down but they can take pictures on the fly by
post #24 of 100
Quote:
Originally Posted by prjindigo View Post

No liquid water, no liquid water based life. Pretty simple.

That's just speculation based on our observation. Maybe other life forms in the universe can live on compressed gases like liquid nitrogen, hydrogen or methane or might be silicon-based. What the scientist are concerned about is human habitable planets. Just because "we" can't live there doesn't mean other life forms can't.

Which leads me to the theory that we haven't been visited by aliens yet because they could not survive our toxic water and oxygen planet.
post #25 of 100
Quote:
Originally Posted by daviejams View Post

Not going to spend humans , tiny robot spaceships instead. I read a thing about it the other week in the news, guy reckons they can build a giant laser on earth and use it to push these tiny robots up to 0.2% of light speed which would get them to this planet in twenty years. Obviously they won't be able to slow down but they can take pictures on the fly by

At 4 light years, you'd need to travel 20% the speed of light (1 light year every 5 years) to get there in 20 years (1/5 as opposed to 1/50). I'll leave the construction, powering, aiming, and shooting of the laser through the atmosphere to others.
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post #26 of 100
0.2% is really 1/500th, but either way, the point still stands. Space is stupid big. It's like a sick joke thinking we can get anywhere to view things of interest ourselves in any meaningful amount of time. We need to find ways bend spacetime or something.
 
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post #27 of 100
Quote:
Originally Posted by daviejams View Post

Not going to spend humans , tiny robot spaceships instead. I read a thing about it the other week in the news, guy reckons they can build a giant laser on earth and use it to push these tiny robots up to 0.2% of light speed which would get them to this planet in twenty years. Obviously they won't be able to slow down but they can take pictures on the fly by

The plan is actually to accelerate these probes to 20% the speed of light, thus allowing them to get there in 20 years or so. After that we wait another 4 years for whatever information it gathers to get back to us More information on the project, including technical challenges, can be found here: https://breakthroughinitiatives.org/Initiative/3
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post #28 of 100
You have to love science sometimes ----<.
Edited by Gunderman456 - 8/25/16 at 9:46am
 
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post #29 of 100
Quote:
Originally Posted by Silent Scone View Post

With cynicism like that, no matter how realistic - you should go test the atmosphere yourself. Breathe it in.
It's not cynicism, it's the truth.

Something in the "habitable zone" of a red dwarf is so close to the star that it would become tidally locked to the star very quickly, which means that one side of the planet would be in continuous light and the other in continuous darkness, which means the planet wouldn't be habitable no matter what zone it was located in. Even if the atmosphere somehow didn't all freeze out on the dark side, there's also the fact that Proxima is a known flare star, and the flares coming off it would batter something as close as this planet is.

So basically, you have a planet that is half furnace and half freezer, and irradiated all to hell by the flares coming off its star. Researchers put out these breathless press releases and ignore inconvenient facts because they know the mass media, which doesn't know (or care) about these inconvenient facts, will pick them up and transmit them to the general public, which doesn't know them either. However, they will push for additional research, which means money, which is what the researchers needed all along. Look, it's even happening on this thread. Someone wants the world to do Breakthrough Starshot because of this!
     
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post #30 of 100
Quote:
Originally Posted by jsc1973 View Post

It's not cynicism, it's the truth.

Something in the "habitable zone" of a red dwarf is so close to the star that it would become tidally locked to the star very quickly, which means that one side of the planet would be in continuous light and the other in continuous darkness, which means the planet wouldn't be habitable no matter what zone it was located in. Even if the atmosphere somehow didn't all freeze out on the dark side, there's also the fact that Proxima is a known flare star, and the flares coming off it would batter something as close as this planet is.

So basically, you have a planet that is half furnace and half freezer, and irradiated all to hell by the flares coming off its star. Researchers put out these breathless press releases and ignore inconvenient facts because they know the mass media, which doesn't know (or care) about these inconvenient facts, will pick them up and transmit them to the general public, which doesn't know them either. However, they will push for additional research, which means money, which is what the researchers needed all along. Look, it's even happening on this thread. Someone wants the world to do Breakthrough Starshot because of this!

all of that is mentioned in the article linked btw.
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