‘Oumuamua: alien starship or just another piece of rock that farted Hydrogen gas as it left the Solar System?
-
Amarnath S wrote:
immigration form at airport categorises me as an alien.
You should arrive without your passport. You'll then be upgraded to undocumented. :)
Freedom is the freedom to say that two plus two make four. If that is granted, all else follows. -- 6079 Smith W.
Daniel Pfeffer wrote:
You'll then be upgraded to undocumented.
That's only if he promises to vote a certain way. Otherwise, he'll be deported.
The difficult we do right away... ...the impossible takes slightly longer.
-
What do you think? And, even though I am an astrophysicist by profession, I am not an expert on the Solar System, so don't ask me... However, I speculate that it actually was an alien starship. I think aliens are out there. And I think they used the Sun as a "gravity assist" vs. the center of the Galaxy, and that there were life forms on ‘Oumuamua. I agree with Harvard professor, Avi Loeb[^] when he speculated that ‘Oumuamua is, indeed, an alien starship. I mean, what else could it be? I don't believe that it is just a rock that farted Hydrogen gas[^]. And, yes, there is some debate as to whether we should capitalize the world Hydrogen. I am of the religious persuasion that we should capitalize the names of chemical elements :) I doubt we will know the 'absolute truth' for sure. Not until we can be like in Rondezvous with Rama by Arthur C. Clarke[^] and actually launch a spacecraft quickly (i.e., on-the-fly) from Earth and rendezvous with it. I wonder, if there really were aliens aboard ‘Oumuamua, they were sapient, intelligent, and conscious, and if, say, we were able to quickly and on-the-fly try to rendezvous with it, would they just see our spacecraft approaching them and either (a) accelerate to warp / hyperspace to escape us, (b) let us chase them until we exhausted our fuel, (c) fire on us with their weapons, or (d) open hailing frequencies? In the case of (d), would we be able to understand each other? Or would they have to send Interlac[^] or Linguacode[^]? I think any civilization that can construct something like ‘Oumuamua would shoot first and ask qu
Heh... they're probably seeking 'absolute truths'. Your sequence reminds me of Rogue Trader where the ABC options of encountering a ship can be very similar. I think to assume advanced beings haven't overcome what seems to be nature's fight/flight basic instinct is... an assumption. For one, maybe they've never encountered anything that can digest or shoot them. Maybe they've never shot each other? I'd put that as pretty remote, but...
-
My perspective was solidified when I learned about the Drake equation. Given the sheer vastness of space, I'm inclined to believe it's inconceivable we're alone in the universe. But at the same time, because of its vastness, I find it highly unlikely any civilization could ever construct some apparatus that could survive the harsh conditions of interstellar travel. And then could be found by intelligent life. And then have it recognized for what it is.
In my mind, the Drake equation is just an hypothesis. It's not meant to be a description of the way the Universe actually works. I firmly believe in (and this is purely subjective on my part), "Where there's a will, there's a way." And in, "100 experiments can prove my theories true, but it only takes one counterexample to prove them wrong." I'm inclined to both believe it is inconceivable that we're alone in the universe and I am also inclined to take the Drake equation with a grain of salt. Just because Drake (whoever he was) wanted to be a poo-poo head and rain on everybody's parade, should not mean we should discount empirical evidence that may contradict it, when such evidence is found.
-
Quote:
I think they used the Sun as a "gravity assist"
To travel between solar systems takes light many many years. The technology to do that for a ship, I think, would be way ahead of having to use something as archaic as Gravity Assist. So alien life. I think that would be more of a case of wishful thinking. :confused:
A Fine is a Tax for doing something wrong A Tax is a Fine for doing something good.
I disagree. The use of the Sun's gravity can not only be used for speeding up / slowing down relative to the Galactic center, but also for a course-correction (i.e., to get the ship pointing in a substantially different new direction without the use of too much fuel).
-
Yes, and Ringworld was Larry Niven.
I got the two mixed up :) My OP was fixed.
-
Extraordinary assertions require extraordinary proof. To date I have seen no convincing proof that ‘Oumuamua is anything but what it seems to be - a chunk of interstellar rock that happened to pass through our Solar System. I would be very interested in seeing incontrovertible evidence otherwise. (And no, a Hydrogen "fart" as it left the Solar System is not incontrovertible evidence)
Freedom is the freedom to say that two plus two make four. If that is granted, all else follows. -- 6079 Smith W.
Just because we ourselves have not learned enough about the physics of how the Universe works in order to invent a means of casual interstellar travel does not mean some mind elsewhere in the Universe hasn't thought it up. I speculate that the astrnomers who talk about Rama (oops I mean, 'Omuamua) farting Hydrogen gas stretch to find mundane explanations for actual alien starship behavior due to their refusal to believe that life exists elsewhere in the universe, or that just because we haven't come up with technology to conveniently cross interstellar distances doesn't mean that some other brain out there in the universe has not discovered such a method, and we are merely ignorant of how the Universe works to a degree that we cannot conceive of anything. There is such a thing as "falsification bias," where people who strongly disbelieve a certain preposition will work tirelessly to prove it false -- which is a GOOD thing, don't get me wrong! But sometimes I think people work too hard to so, when obvious evidence in support of a theory is staring them straight in the face. The opposite of confirmation bias could be considered as "disconfirmation bias" or "falsification bias." This describes a tendency to seek out evidence that contradicts one's preconceived notions or beliefs, rather than selectively interpreting information that supports them. In your example, if someone harbors a strong disbelief in the possibility of intelligent life elsewhere in the universe and actively seeks out evidence that disproves this notion, they may be exhibiting disconfirmation bias. This bias could lead them to discount or ignore data that suggests the existence of intelligent extraterrestrial life or the feasibility of interstellar travel.
-
Daniel Pfeffer wrote:
We have been sending electromagnetic radiation out for only a short period, and even now are increasing the efficiency of our usage - beams vs broadcasts, etc. It could be that other technological species have gone even further along this route, and it is therefore almost impossible to "eavesdrop" upon them.
I forget who mentioned it a good while ago, but someone made a tremendous point: We've been broadcasting in the clear for a few decades, but our communications have since mostly been encrypted. Once you bring in encryption, there is no discernable pattern. It all looks like random noise. Which is the intent. If alien civilizations have been encrypting their communications (and there's few reasons to think they would not), analyzing whatever our radio-telescopes are picking up ain't gonna reveal anything.
Quote:
If alien civilizations have been encrypting their communications (and there's few reasons to think they would not), analyzing whatever our radio-telescopes are picking up ain't gonna reveal anything.
I am wondering whether you're making the assumption that radio telescopes receive the content of alien broadcasts, such as in the movie "Contact." Maybe they do. I myself am not a radio astronomer so I am not an expert in such things. But even with encrypted transmissions you can still look at the spectrum and power spectrum of such emissions. If there is a lot of power in a small frequency range then that may be indicative of something. I mean, okay, spread spectrum is also in use, but only certain blocks of the EM spectrum are in use for communications/broadcasting, spread or not.
-
What do you think? And, even though I am an astrophysicist by profession, I am not an expert on the Solar System, so don't ask me... However, I speculate that it actually was an alien starship. I think aliens are out there. And I think they used the Sun as a "gravity assist" vs. the center of the Galaxy, and that there were life forms on ‘Oumuamua. I agree with Harvard professor, Avi Loeb[^] when he speculated that ‘Oumuamua is, indeed, an alien starship. I mean, what else could it be? I don't believe that it is just a rock that farted Hydrogen gas[^]. And, yes, there is some debate as to whether we should capitalize the world Hydrogen. I am of the religious persuasion that we should capitalize the names of chemical elements :) I doubt we will know the 'absolute truth' for sure. Not until we can be like in Rondezvous with Rama by Arthur C. Clarke[^] and actually launch a spacecraft quickly (i.e., on-the-fly) from Earth and rendezvous with it. I wonder, if there really were aliens aboard ‘Oumuamua, they were sapient, intelligent, and conscious, and if, say, we were able to quickly and on-the-fly try to rendezvous with it, would they just see our spacecraft approaching them and either (a) accelerate to warp / hyperspace to escape us, (b) let us chase them until we exhausted our fuel, (c) fire on us with their weapons, or (d) open hailing frequencies? In the case of (d), would we be able to understand each other? Or would they have to send Interlac[^] or Linguacode[^]? I think any civilization that can construct something like ‘Oumuamua would shoot first and ask qu
Brian C Hart wrote:
I agree with Harvard professor, Avi Loeb[^]
However he is far from an unbiased observer. Astronomer Avi Loeb Says Aliens Have Visited, and He's Not Kidding | Scientific American[^]
Brian C Hart wrote:
I think aliens are out there. And I think they used the Sun as a "gravity assist" vs. the center of the Galaxy
The first part however is far different than the second part. The first presumes that one just does some hypothesizing based on some very, very large numbers. So with 200 billion trillion stars it would seem likely that there is at least some microbes out there. The second part however requires that those aliens are doing a lot with science and technology for which there is no evidence.
-
Just because we ourselves have not learned enough about the physics of how the Universe works in order to invent a means of casual interstellar travel does not mean some mind elsewhere in the Universe hasn't thought it up. I speculate that the astrnomers who talk about Rama (oops I mean, 'Omuamua) farting Hydrogen gas stretch to find mundane explanations for actual alien starship behavior due to their refusal to believe that life exists elsewhere in the universe, or that just because we haven't come up with technology to conveniently cross interstellar distances doesn't mean that some other brain out there in the universe has not discovered such a method, and we are merely ignorant of how the Universe works to a degree that we cannot conceive of anything. There is such a thing as "falsification bias," where people who strongly disbelieve a certain preposition will work tirelessly to prove it false -- which is a GOOD thing, don't get me wrong! But sometimes I think people work too hard to so, when obvious evidence in support of a theory is staring them straight in the face. The opposite of confirmation bias could be considered as "disconfirmation bias" or "falsification bias." This describes a tendency to seek out evidence that contradicts one's preconceived notions or beliefs, rather than selectively interpreting information that supports them. In your example, if someone harbors a strong disbelief in the possibility of intelligent life elsewhere in the universe and actively seeks out evidence that disproves this notion, they may be exhibiting disconfirmation bias. This bias could lead them to discount or ignore data that suggests the existence of intelligent extraterrestrial life or the feasibility of interstellar travel.
Brian C Hart wrote:
Just because we ourselves have not learned enough about the physics of how the Universe works in order to invent a means of casual interstellar travel does not mean some mind elsewhere in the Universe hasn't thought it up.
True. Throughout history, what was considered an "acceptable hypothesis" has changed. At one time, it was acceptable to claim that one's cake didn't rise because the neighbour's wife (a witch) put the "evil eye" on the cake. Today, such a hypothesis is unacceptable. An acceptable hypothesis would be forgetting one of the ingredients, or setting the oven to the wrong temperature. While technological civilisations almost certainly exist elsewhere in the Universe, the evidence for their existence is such that I do not believe that "it's aliens" is currently an acceptable hypothesis. Were evidence to be found of the existence of aliens (signals, a Bussard ramjet, a Dyson sphere, a Ringworld :) ), I would reevaluate.
Freedom is the freedom to say that two plus two make four. If that is granted, all else follows. -- 6079 Smith W.
-
Quote:
If alien civilizations have been encrypting their communications (and there's few reasons to think they would not), analyzing whatever our radio-telescopes are picking up ain't gonna reveal anything.
I am wondering whether you're making the assumption that radio telescopes receive the content of alien broadcasts, such as in the movie "Contact." Maybe they do. I myself am not a radio astronomer so I am not an expert in such things. But even with encrypted transmissions you can still look at the spectrum and power spectrum of such emissions. If there is a lot of power in a small frequency range then that may be indicative of something. I mean, okay, spread spectrum is also in use, but only certain blocks of the EM spectrum are in use for communications/broadcasting, spread or not.
Additionally, if the transmission is in binary (1 bit/time period), one will see that all data are multiples of a certain basic size (e.g. 00111010000... has blocks of lengths 2, 3, 1, 1, 4, ... bits). This is true even if the data are encrypted. Other forms of encoding also have their characteristic patterns which can show that a message is being transmitted, even if we cannot read the message.
Freedom is the freedom to say that two plus two make four. If that is granted, all else follows. -- 6079 Smith W.
-
In my mind, the Drake equation is just an hypothesis. It's not meant to be a description of the way the Universe actually works. I firmly believe in (and this is purely subjective on my part), "Where there's a will, there's a way." And in, "100 experiments can prove my theories true, but it only takes one counterexample to prove them wrong." I'm inclined to both believe it is inconceivable that we're alone in the universe and I am also inclined to take the Drake equation with a grain of salt. Just because Drake (whoever he was) wanted to be a poo-poo head and rain on everybody's parade, should not mean we should discount empirical evidence that may contradict it, when such evidence is found.
Brian C Hart wrote:
In my mind, the Drake equation is just an hypothesis. It's not meant to be a description of the way the Universe actually works.
Sure, it's little more than a thought experiment, that lets you play around plugging in wildly varying numbers and see how they affect the outcome. Garbage in, garbage out.
