Super-Earths' powerful gravity could preclude alien civilizations from leaving their planets

Discussion in 'Science' started by Durandal, May 17, 2018.

  1. cerberus

    cerberus Well-Known Member Past Donor

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    NASA's already working on that. Any day now we'll get an announcement they've cracked it, and the usual suspects will be all agog.
     
    Last edited: May 23, 2018
  2. Nightmare515

    Nightmare515 Ragin' Cajun Staff Member Past Donor

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    Well according to Star Trek yeah lol
     
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  3. Dutch

    Dutch Well-Known Member Past Donor

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    How many of Jules Verne predicting have come true in less than 200 years, and how many of them seemed well... fiction at the time of writing?
     
  4. Nightmare515

    Nightmare515 Ragin' Cajun Staff Member Past Donor

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    Hey I'm not disagreeing with you, in fact I hope you're correct I just personally don't think so.

    I'm a science guy and while Star Trek was always hailed as the more "science" type sci fi show as opposed to something like Star Wars it still relies pretty heavily on what is basically magic.

    The Syfy show "The Expanse" seems way more plausible in 300 years than Star Trek does. Humans colonizing the Solar System and having space military's and whatnot is probable and possible within the realm of actual physics. And if/when humans colonize Mars and get it up and running then the Earth will more than likely go to war with Mars because that's what humans tend to do lol. Warp drives powered by diluthium crystals is supposedly possible in theoretical physics but is basically just magic.

    The main difference between theorists of the past and theorists of the past century is the fact that those in the past didn't have Special Relativity. Well it was there but they didn't know about it. So basically their minds were open to just fantasize about whatever the human brain could possibly imagine without restriction. Fast forward to the 20th century and we now have some pretty strict guidelines on what we can actually fantasize about. Everything that Jules Verne foresaw was possible within the realm of physics and he predicted all of this stuff and died prior to Einstein publishing his journal on Relativity. Jules didn't KNOW that this stuff was actually possible he just assumed it was and was right because there was no guideline out there telling him what was and wasn't actually possible.

    Now we have a better understanding of physics and can't just fantasize about things at will because we have a rule book that says what actually is and is not possible.

    Nonetheless we by no means know everything, not even close. Science is constantly changing and evolving and even though Einstein's theories continue to get verified to this day that still doesn't mean that he was the be all end all of our understanding of the cosmos. We very well may discover something that we couldn't even fathom.
     
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  5. WillReadmore

    WillReadmore Well-Known Member

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    I certainly agree that we should continue to study our universe and it's physics in all the ways we can.

    But, when people project "expected" rates of progress or when they question our dedication because of their perception that we aren't learning as fast as we "should" I tend to call BS.

    Even when physics supplies great ideas, like fusion reactors for cheap power, it is NOT the case that we can implement them in short order.

    So, I agree that at some distant point we may have a human who leaves our solar system. But, let's remember that as of now, we don't even have a clue what the mission of such a venture might be. For example, the nearest exoplanets (at the Proxima system) are a LONG way away and are known to have gigantic reasons for humans not to want to be anywhere near them, even in orbit.

    I'd add that I'm not a big fan of spacemen in the first place. The cost of protecting humans in space is stupendous. We can send a fantastic array of exploration technology for a tiny fraction of the cost. It's said that a man on mars would cost at least a thousand unmanned missions, meaning that one human to mars would cost us the exploration of numerous other destinations within our solar system.

    I'd like to see more focus on stuff like communications infrastructure in space, so each satellite doesn't have to have the power and antenna size to communicate directly to earth. Let's pack our payloads with hundreds of satellites so we're not stuck going to one destination every x number of years.

    Let's measure progress by how much we learn, not where we were able to send and retrieve a human body.
     
  6. Nightmare515

    Nightmare515 Ragin' Cajun Staff Member Past Donor

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    I certainly agree about human space flight. The cost vs reward for those endeavors rarely make them worth it. For the most part us sending human beings in space is one of those things that we do so that we can say we did it. It does have it's benefits, such as if we obviously want to colonize Mars we need to send actual people there at some point, but I highly doubt that when the first humans step foot on Mars they are going to discovery anything significant that we didn't already know about from decades of sending robots there.

    I'd much rather we dump resources into something like a gigantic multiple linked space telescope system that can peer deep into the cosmos. I'd also personally rather they dump the human Mars mission and pool all of those resources into making a Europa lander. I'm 100x more interested in landing a robot on Europa than I am landing people on Mars. The human Mars mission is going to happen though and will remain the focus for humans for the foreseeable future mainly because "we put people on another planet" is a pretty big deal for humanity.

    I'm with you, if it were up to me Mars would get put on the back burner and we'd be launching robots to Europa and Enceladus and building space telescope networks. But unfortunately for us organizations like NASA are at the mercy of Congress and public tax dollars. "The people" want people on Mars. From a pure scientific standpoint there are much better ways to spend our money and part of NASA's job is to sort of keep justifying to the public why they should keep getting money.

    Just wait and see. When James Webb launches and the public gets to "see" what James Webb shows them on Google then you are going to have a lot of very pissed off people wondering why we spent $10 billion US tax dollars on that thing because to the general public it's not going to show them anything "cooler" than Hubble has been doing for nearly 30 years because they don't understand what it was built to do.
     
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  7. WillReadmore

    WillReadmore Well-Known Member

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    Amen - well said.

    There are far too many really interesting objectives to blow NASA's budget on creating Martians.
     
  8. LiveUninhibited

    LiveUninhibited Well-Known Member

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    It's stupid of them to say that they couldn't leave their planets. Obviously it would be harder and may require technology beyond what we have on Earth today. We've been doing this rocket thing for, what, 80 years and only half-heartedly most of the time. Kind of ridiculous to say they couldn't escape their planets, or would even be substantially delayed in doing so given how technology can advance, just because our pathetic technology couldn't do it.

    And it's also stupid to imply that super-Earths are more likely to be the places to find civilizations like ours. We found super Earths first because they're big, not because Earth-like planets tend to be big.
     
  9. tecoyah

    tecoyah Well-Known Member Past Donor

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    All the things you mention are currently being built or planned...Mars will be primarily a private company adventure as far as people are concerned.
     
    Last edited: May 24, 2018
  10. cerberus

    cerberus Well-Known Member Past Donor

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    Well Superman escaped Krypton? [​IMG]

    Also, did anyone ever reply to my question as to why NASA is so obsessed with Mars when there's no possibility any human could live there anyways? It's funny that I've asked that question so many times but never get a reply to it from the gullibles. That speaks volumes?
     
    Last edited: May 24, 2018
  11. Nightmare515

    Nightmare515 Ragin' Cajun Staff Member Past Donor

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    I know which sucks because private companies seem to be doing a much better job than NASA at actually getting things done. Not NASA's fault necessarily, they are at the mercy of Congress and public opinion, two things which tend to change their minds about what they consider priorities every handful of years.

    I wish things were reversed. I wish Elon Musk was hell bent on sending a robot submarine to Europa and it was NASA focused primarily on Mars. NASA's Europa lander mission just got scrapped from the budget, again....yet meanwhile ANOTHER Mars rover got approved.

    Just a personal bias on my part I suppose but I really don't care about Mars all that much and it's frustrating that Mars gets most of the attention from everybody and most of the money while there are way more interesting places in our own backyard that I wish we would explore.
     
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  12. politicalcenter

    politicalcenter Well-Known Member

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    Because man has been fascinated with Mars for centuries. We know Venus is too hot and Mars is pretty close....relatively speaking.
     
  13. tecoyah

    tecoyah Well-Known Member Past Donor

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    Mars excites people who have money and curiosity which is why Musk and others focus on it. Exploration for life outside our planet does not appeal to most in Government for religious and "small mind" reasons which obviously hampers NASA missions. With luck NASA will find microbes underground shortly on Mars which will be a game changer and perhaps free up minds and wallets. This will also begin the moral debate centered on what to do about the "Prime Directive" issue, is it okay to contaminate and thus change the future of another lifeform.
     
  14. Nightmare515

    Nightmare515 Ragin' Cajun Staff Member Past Donor

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    I am of the firm belief that if we find any type of "Alien" life whether it be microbes or multi celled organisms then we leave it alone. If we find anything on Mars then I believe we should leave Mars alone. We probably wouldn't though. Humans have a pretty good historical track record of "accidentally" screwing stuff up due to our curiosity and ignorance.

    We are getting better though, science has gotten more responsible over the years. Responsible enough to toss it's probes into gas giants instead of letting them orbit out there forever and possibly smack into a moon that may have life. Or believe they found running water on Mars and ordered the rover to stay far away from it because they didn't want to accidentally contaminate anything that may be here.

    Human curiosity is what I worry about. If we found life on another world I think our curiosity would override our responsibility. Science would want to be responsible and not bother it, but science would also be extremely intrigued by it and want to take a sample of it. Not sure which of those two rationales would win out in the end. Plus there would be an enormous amount of outside pressure from the general public and governments to go and see what it is, especially if it's a multi celled organism.

    Can't blame folks though. I talk about Europa all the time, if NASA's Europa Clipper mission finds concrete evidence of life under that ice then I would REALLY REALLY REALLY want to send a lander down there and see what it is. The moral half of me says we shouldn't do that we should leave it alone, but the amateur astronomer fanatic half of me would be pretty bummed out if we didn't go look at it.
     
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  15. politicalcenter

    politicalcenter Well-Known Member

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    Europa....think of it. A planet with shrimp as big as cows.....or Crabs as big as pickup trucks.
     
  16. Nightmare515

    Nightmare515 Ragin' Cajun Staff Member Past Donor

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    Might be! Who knows?

    I saw a movie on Netflix awhile ago about a Europa mission where the astronauts went down there to see what was under the ice and ended up all getting eaten by some huge bioluminescent squid monster thing lol.
     
  17. wyly

    wyly Well-Known Member

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    the smart thing to do if life is detected elsewhere is stay away, far, far away...we could contaminate it or it could could contaminate us, either way not a good scenario with possible catastrophic results
     
  18. kazenatsu

    kazenatsu Well-Known Member Past Donor

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    Why would we be so worried about that?
    That's already happening with mass movements of people across different parts of the world.

    Anyway, I'm sure those types of views will be regarded as bigotted and xenophobic in the future. Those giant bioluminecent squid type things have just as much right to be on this planet as you do.
     
    Last edited: May 24, 2018
  19. wyly

    wyly Well-Known Member

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    because we'd be dealing with alien life that could be vastly different, neither the alien life or life on earth would have any immunity to the other...sterilization of space equipment is serious business, it's why Galileo was was crashed into Jupiter to avoid any possible contamination of Europa...
     
  20. cerberus

    cerberus Well-Known Member Past Donor

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    Not that long - only since HG Wells wrote War of the Worlds. Oh, and 'We know' only what NASA tells us; it's only a question of whether 'we' believe it or not?
     
  21. Nightmare515

    Nightmare515 Ragin' Cajun Staff Member Past Donor

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    I think that was the point of what he said...

    We find alien life somewhere and start sending probes or people to go and "study" it and we run the risk of contaminating it or it contaminating whatever we sent there. We also run the risk of harming it or altering it's natural development.

    The mass movements of people across different parts of the world wasn't a good thing. We look at it now and its not that big a deal but hundreds of years ago with humanity exploring the world it caused A LOT of problems.

    Just take the Americas for example. Europeans set foot on America and accidentally killed 90% of the Native population with their diseases. All life has just as right to exist on this planet or any other planet that it may be on. It's HUMANS who tend to forget that and disregard that with our antics.

    I'm no hypocrite, I'm obviously a human, and I live in a house that was built on what was probably a forest at one point. But either way we humans don't exactly have the best track record when it comes to respecting nature, or each other. Are we even responsible enough to migrate to another world and start messing around with it? We can't even take care of our own planet.
     
  22. jmblt2000

    jmblt2000 Well-Known Member

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    Let's say that the gravity of a super Earth is relative to size. So a planet ten times the size of Earth would have ten times the gravity. So a 200 lb. man on Earth would effectively weigh 2000 lbs. on a super Earth.

    That would preclude a normal human from ever residing there. Also, natives to this planet would have a much denser bone structure or some adaptation that would allow them to survive in this environment. So if they can withstand the higher gravity, it stands to reason that their bodies would be able to withstand the g-force necessary to escape the gravity well of their planet.

    Now, let's take this the other way. Suppose those aliens landed on Earth with a body that weighed 2000 lbs. On their own planet, now weighs just 200 lbs. This would be equivalent to a modern day Superman. They would definitely be stronger and faster than us.

    Yes I have given this some thought and research as I am trying to write a book.
     
  23. tecoyah

    tecoyah Well-Known Member Past Donor

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    This may come in handy as you write.
     
  24. jmblt2000

    jmblt2000 Well-Known Member

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    Thanks, I've watched that one before. I know what I proposed was not mathematically correct, it was just to illustrate a point without going into heavy mathematical details. By the way, the book I am working on is not about aliens.
     
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  25. wyly

    wyly Well-Known Member

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    even gravity a little bit stronger than earths would be fatal to us...an alien from a super earth I imagine would be like humans on the moon, super awkward for them to get around in low earth gravity just like it is humans on the moon...I think that negates the Superman effect...
     
    Last edited: May 26, 2018

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