Science guy

active 4 weeks ago
active 4 weeks ago
  • Science guy replied to the topic Space and time in the forum General Chat 4 weeks ago

    Very odd that you don’t ‘feel the effects’ of the passing of time. Surely ‘the arrow of time’ is one of the cruelest things about life, that we can do nothing about – like death? How can it possibly be a human invention if we’re so powerless to do anything to counteract it? The whole geological history of our planet is more than enough to prove…[Read more]

  • Science guy posted a new activity comment 4 weeks ago

    “Well we don’t really know, since we can’t see further than the observable horizon. The default model assumes that it is infinite (but that just means “large compared to the observable horizon”).”

    Exactly, just like no one in particle physics believes that the results of the Standard Model of particle physics will hold up to infinite energy…[Read more]

  • Science guy posted a new activity comment 4 weeks ago

    There are privileged positions on the number line. If we consider multiplication for example, 0 is the only number that gives you the same result no matter what you multiply it by, and 1 is the only number that always gives you back the other number. -83.24 whilst I’m sure interesting doesn’t as far as I’m aware fulfill any of these special…[Read more]

    • kal replied 4 weeks ago

      “Re the universe being infinite, my understanding […] is that it’s not infinite, …”

      Well we don’t really know, since we can’t see further than the observable horizon. The default model assumes that it is infinite (but that just means “large compared to the observable horizon”).

      ” … it’s been expanding from a size of effectively zero at…[Read more]

      • “Well we don’t really know, since we can’t see further than the observable horizon. The default model assumes that it is infinite (but that just means “large compared to the observable horizon”).”

        Exactly, just like no one in particle physics believes that the results of the Standard Model of particle physics will hold up to infinite energy…[Read more]