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Possible Habitable Planet Just 12 Light Years Away
sciencehabit writes "Astronomers have discovered what may be five planets orbiting Tau Ceti, the closest single star beyond our solar system whose temperature and luminosity nearly match the sun's. If the planets are there, one of them is about the right distance from the star to sport mild temperatures, oceans of liquid water, and even life (paper)."
I've got my own helmet. Where do I sign up?
plop
Keep in mind that Voyager, apart from some gravitational assists, wasn't ever really made to "go fast". Even now, there are ways to send things moving much quicker such as the Ion Thruster which although not NEARLY as powerful as a chemical rocket, is amazingly more efficient. The Weight to Thrust ratio is fantastic and could well be utilized to provide constant thrust for a long time. Once you exit the earth's gravity well, something like an Ion Thruster could over a number of years accelerate a craft to a much higher speed.
Moved to http://soylentnews.org/. You are invited to join us too!
Could you get more by slingshotting around the sun?
Yeah, but you'll end up in San Francisco in 1986 so it won't do you any good.
The math is wrong - Voyager I is 0.71 light days away, or 0.0019 light years away. It will take a lot longer than 840 years to get to another star.
Why would you put the people in charge on the second bus?
"On a small scale" is an understatement. We have virtually sent no signals at all. To any system past Alpha Centauri we would be dead silent on a radio scan of our system 99.9999999999999999999999999999% of the time. Are you wondering why we haven't made any effort to send signals? Fear. Even many radio astronomers themselves are frightened of attracting the attention of more advanced civilizations that may be listening. If we are too afraid to do it other civilizations may be as well. So we all listen but never speak. Everyone will stay very quiet out of ignorance and fear. Hence Fermi's Paradox and The Great Silence.
Quite an experience to live in fear, isn't it? That's what it is to be a slave.
it was determined that at TV frequencies the Earth was the brightest (known) object in the galaxy.
That is until they learn to decode the signals. Then they will stop thinking we are bright.
So basically it is like high school dating on a galactic scale?
The Vulcans came from the habitable planet that orbited Tau Ceti, according to my Starfleet Technical Manual. Given that they invented the Prime Directive, they probably have to maintain radio silence (frex, using very directional masers where necessary for radio-band communications) to avoid clueing in lesser civilizations.
Plus the Andorians live right next to them and we all know what they are like.
He had foreseen this. The planet around Tau Ceti is called Aurora. It is the home of long-living humans and mind-reading robots.
No, you do mean the inverse square law. The inverse square law states that the intensity of radio waves (or light) decreases with the square of the distance to the source. The square-cube law is about the surface relative to the volume: The surface increases with the square of the size, while the volume increases with the cube. This means that the same structure at different sizes would not have the same properties. For example, a giant ant would not be able to get enough oxygen, as its ability to get oxygen follows its surface area, while its oxygen demand follows its volume. Likewise, it would be crushed under the weight of its own exoskeleton, as its strength is proportional to the square of the size, while its weight is proportional to the cube.
I think that fear of attracting attention is very misguided. Civilisations capable of mass interstellar travel automatically have much better opportunities to pursue ... than to go torment younger single-planet civs.
Who said anything about tormenting? The Vogons did not destroy earth to torment, but for practical reasons. They were described as "Not cruel, just callous". I destroy wasp nests, but not to torment them. I recently trapped a dozen mice in my attic; I actually felt sorry for them, they look cute, but knew that if I let them be they would be taking over the house.
Such an advanced civilisation might see us as we see an ants nest. And don't depend on talking our way out of it, reasoning with them. They would be on a totally different mental wavelength. Most higher animals on Earth talk to each other (that is what "birdsong" is for example), and we have lived for thousands of years alongside them, yet most people will not even accept that they do so - let alone listen.