Recent content by progan01

  1. P

    Uranus up close: What proposed NASA 'ice giant' mission could teach us

    I take it you have never worked with a gyroscope, or owned so much as a toy one. Or you would have some personal experience of the amount of force required to change the direction in which a gyroscope, or any turning cylinder or ring, is rotating. This is what is meant by rotational energy, and...
  2. P

    Uranus up close: What proposed NASA 'ice giant' mission could teach us

    Didn't you notice that the 'simulation' you posted showed only a two-dimensional animation of the potential impact, with no explanation for how or to what degree this would change the planet's rotational axis? Not to mention that nothing is said about the destruction of rings and moons and their...
  3. P

    Uranus up close: What proposed NASA 'ice giant' mission could teach us

    The energy required to shift the rotational axis of a planet is considerably in excess of the amount of energy required to disintegrate the planet entirely, leaving a ring about the Sun that would, due to the effect of orbital harmonics, disperse to other stable orbits, likely colliding with...
  4. P

    Uranus up close: What proposed NASA 'ice giant' mission could teach us

    I should be very interested in any theory that can explain how a single planetary collision could tilt not just Uranus but its rings and major satellites to the same precise degree. That's a billiard shot I'd pay a DOLLAR to see.
  5. P

    Could life thrive on hydrogen-rich alien worlds?

    Has anyone considered that this discovery means we have already possibly contaminated both Jupiter and Saturn with the Galileo and Cassini probes? Our understanding was that life did not and could not exist in their atmospheres, which made them safe to crash our spacecraft into in order to avoid...
  6. P

    Avoiding space debris might require new legal framework, US lawmakers say

    Not mentioned here, and it should be, is the increasing danger that a sizable impact between two or more large satellites will create many thousands of fragments, many of them too small to track with conventional instruments, that will collide with other orbiting craft or debris and create an...