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  1. S

    How far are we away from technology that would allow us to send an unmanned probe...

    Centuries. And even with advanced technology that would allow a craft to carry enough fuel and accelerate to 10% light speed (19,000 miles per second), that would still be at least a 50 year trip plus the 4.3 years to send information back to us via radio.
  2. S

    Hubble's Law Astronomy?

    I'd have gone with D. If the Universe is expanding, it must have been smaller in the past.
  3. S

    Is there a max velocity in a frictionless environment when an object is pulled...

    The maximum velocity that can be achieved by a gravitational force is the speed of light. That can happen to matter falling into a black hole.
  4. S

    Is there a max velocity in a frictionless environment when an object is pulled...

    The maximum velocity that can be achieved by a gravitational force is the speed of light. That can happen to matter falling into a black hole.
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