Recent content by Dragrath

  1. Dragrath

    Theories on Neptune temp change?

    In the context of the observed changes beyond just seasonal shifts its important to note that you can get shifts from internal dynamical cycles such as El Nino/La Nina related to rates of ocean overturning in the Pacific. Given that Neptune's main heat source appears to be primarily internal I...
  2. Dragrath

    Gravity and expansion

    Hmm this seems to have been an interesting thread some good questions here particularly the bit on whether we can treat time as passing at the same rate, (quite simply you can not) after all remember that its called General Relativity for a reason there are some important nuances that I think...
  3. Dragrath

    Violations of the Second Law of Thermodynamics

    Ok you seem to be making a big deal about this but one thing that tends to get missed is that we now know that the second law of thermodynamics is a consequence of information theory that is to say it is the criteria needed to be able to in principal reconstruct the past state of a system...
  4. Dragrath

    Does an object orbiting close to a black hole appear to orbit slower due to time dilation?

    In terms of physics I'm not aware of anything which would cause what they described frankly what goes on within or at the event horizon is not known as we have no theories which can be applied directly within this regime In all likelihood our models will break down before one reaches the event...
  5. Dragrath

    Does an object orbiting close to a black hole appear to orbit slower due to time dilation?

    Yes of course but one issue with regards to this slowdown is that for most applicable black holes these effects would be accompanies with other relativistic effects such as length contraction and gravitational redshift all of which are likely only significant extremely close to the black hole...
  6. Dragrath

    Why does time seem to flow only in one direction?

    Yep that is in principal the same root cause related to initial conditions and assumptions and how those apply to systems of differential equations. Your choice of axioms, assumptions, and initial conditions all matter a lot when dealing with complex systems of differential equations it is...
  7. Dragrath

    Why does time seem to flow only in one direction?

    In general there are lots of things in science which can be described in terms of a fudge factor generally these initially are put in place as placeholders for something we don't understand but if you aren't careful the underlying assumptions, approximations and placeholders can effectively...
  8. Dragrath

    Why does time seem to flow only in one direction?

    The cosmological principal might seem natural when the explanation used to justify it is that the laws of physics are the same everywhere, however this is not mathematically what cosmologists mean when they apply the cosmological principal. Specifically the assumption they refer to is the idea...
  9. Dragrath

    Why does time seem to flow only in one direction?

    Oof yeah that was supposed to be assumptions not approximations. That typo may have subconsciously been myself relating to one of the main problems with the current model of cosmology which is the assumption that any deviation from perfect isotropy is small enough to be negligible which the...
  10. Dragrath

    Why does time seem to flow only in one direction?

    Yeah time is interesting in that there isn't even agreement about whether it is fundamental or not as while it appears that thanks to experiments such as the delayed choice experiment and bells inequality we can say that either space or time are not fundamental, though this neglects a third...
  11. Dragrath

    Asteroids - Agreed Terms - April 2022

    One technical point to add here is that as they are currently defined asteroid and dwarf planet are not mutually exclusive categories. As such Ceres is both an asteroid and a dwarf planet. Composition wise the origin of various asteroids are still somewhat unresolved as we don't yet have a well...
  12. Dragrath

    Question Question about the scale of the universe

    In Quantum Field Theory what we call particles are really the smallest quanta of energy carried within a particular quantum field hence the definition of size becomes murky in fact there is evidence to support that the very notion of space (or alternatively time though the latter seems less...
  13. Dragrath

    Mars Colonies are a Fantasy

    But I did read most of the posts (Including yours) what about my comment bothered you? I did decide to not target responses to any specific posts given there were so many but I hoped it would be apparent what points I was agreeing with versus those I disagreed with after all I do know there...
  14. Dragrath

    Mars Colonies are a Fantasy

    Since this has been revived I will add my thoughts to this. 1)Economics related to the transport of resources with Earth are unlikely to ever be profitable since everything Mars has can be more easily obtained on Earth the Moon or asteroids. The only resources which might be viable is Uranium...
  15. Dragrath

    Is it possible for us to discover habitable planets close to us?

    Yeah I don't think we will ever reach the capacity to travel interstellar distances at least while being anything remotely similar to what we are now. In a little over a million years there will naturally be an easy opportunity to reach Gliese 710 a orange k dwarf star for example during its...