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Hunt Intensifies For Aliens On Kepler's Planets
astroengine (1577233) writes "Could ET be chatting with colleagues or robots on sister planets in its solar system? Maybe so, say scientists who last year launched a new type of Search for Extraterrestrial Intelligence, or SETI, project to eavesdrop on aliens. Using data collected by NASA's Kepler space telescope, a team of scientists spent 36 hours listening in when planets in targeted solar systems lined up, relative to Earth's perspective, in hopes of detecting alien interplanetary radio signals. "We think the right strategy in SETI is a variety of strategies. It's really hard to predict what other civilizations might be doing," Dan Werthimer, director of SETI research at the University of California Berkeley, told Discovery News. So far the search hasn't turned up any artificial signals yet, but this marks a change in strategy for radio searches for ETI with Kepler data taking a focused lead."
I'm still looking for terrestrial intelligence!
If we could get some meaningful immigration reform, we wouldn't have to spend so much time hunting for them.
That's kind of an ignorant view. Considering the amount of resources in the uninhabited parts of the universe (which is beyond a staggering amount) why would any one enter conflict over a small planet (us).
Any species capable of interstellar travel is going to be able to pull resources out of pure energy. They don't mine, or need our water. They don't care what we do, except maybe they observe us and snicker.
Another consultant who stuck it out.
"We are the Priests, of the Temples of Syrinx..."
Some might question why we're working so hard to advertise our existence when we still have exploitable mineral wealth and liquid water.
Because anyone capable of travelling a few hundred light years has also developed other technologies and doesn't need our mineral and water.
If the Extraterrestrials have some, intelligence that is, they'd go through great pains to leave us rot.
the idea is that if there's a solar system out there where a civilization exists which is sending signals between planets (kind of like we're doing on a limited scale with the Mars orbiters and rovers), it's likely that the signals between the planets are highly focused in a single direction, and so the ideal time to listen would be when the planets are lined up with respect to Earth.
Since we have no idea what kind of signals they are using (radio is the most popular method for our civilization but lasers are also good communications devices) the search would sweep over as much EM spectrum as it could. It's a really clever idea that would definitely pick up interplanetary communications, IF we can recognize the signals as such. As it stands, noise - and the fact that sufficiently advanced communications could be indistinguishable from white noise - limit our ability to do that.
But anyway, I like the idea because it doesn't presume that they are sending interstellar communications (which requires a high level of advancement), sending incredibly powerful bursts of omnidirectional signals (which requires some unknown reason since it's a pointless thing to do) or specifically aiming their signals at us (which requires a high level of self-importance on our part). If there are civilizations with the same level of advancement as us, we'll find them.
A fool and his hard drive are soon parted.
Surely this is the job of NSA not NASA
Optical SETI is the way to go. A 10-meter diameter visible telescope has a gain 80 dB greater than that of the 300-meter Arecibo dish.
Current NIF lasers can deliver petawatts for nanoseconds, and could easily outshine the sun during their pulse if provided with a reasonably large telescope.
When we (at C) see A,B and C line up, what we are seeing is a long past event. The property of alignment, determined by optical means, is exactly the time at which we would look for a signal traveling at the speed of light (electromgnetic).
Have gnu, will travel.
Yes, you want to listen when then are lined up, because you are effectively looking back in time. It's not like you are seeing them "now", but have to somehow look ahead the amount of time it takes to receive any signal. The light and the signal arrive at the same time.
So your thinking is they couldn't find us on their own, but once they know we're here they hold a meeting and say "Fuck all those planets without intelligent life. Let's go clean out those Earthing chumps."
He also said "Hey, I'm not dead yet, ya prick."
A and B are planets in one solar system or two different solar systems. We can assume that any civilization intelligent enough to engage in interplanetary radio (or laser) communications will have figured out how to aim their transmitter and how far to 'lead' their target to compensate for the finite signal speed.
Since the A to B alignment is determined optically (automatically including a factor for how far apart A and B are), we (at C) just have to be in that same line to intercept any signals.
Now, if we want to reply to A or B, we would have to figure out the aiming and lead problem.
Have gnu, will travel.
To Serve Mankind
Well, we have spent several centuries mining and purifying elements. I can think of some examples in our own world where invasions have happened to exploit technologically backward societies possession of mineral wealth.
Okay, let's assume that a space-faring civilization needed resources and had so exhausted the resources of their home solar system that they needed to exploit the resources of another solar system, then further assuming that our solar system was convenient to them, and further assuming that they had the capacity to exploit the resources in our solar system.
Given all of that, why would they come into a gravity well like the Earth's when they could get enormously more water and organic molecules from Kuiper Belt objects and enormously more metals/silicon/rocky elements from the asteroid belt than from here, without ever entering a gravity well of any consequence?
That would be like mining salt in the Mariana Trench.
No, no, you're not thinking; you're just being logical. --Niels Bohr