What would Earth look like from the surface of a neutron star?

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Offline Alan McDougall

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What do you think beings living on a neutron star, would perceive, if they could look at what was happening on earth?

Time flow on a neutron star, should almost be static relative to that on earth?

Alan
« Last Edit: 27/05/2016 13:51:08 by chris »
The Truth remains the Truth regardless of our beliefs or opinions the Truth is always the Truth even if we know it or do not know it (The Truth remains the Truth)

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Offline evan_au

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A being living on a neutron star, at a temperature of millions of degrees would not see Earth at all - it would be shrouded in an impenetrable blackness at almost absolute zero.
- The time dilation on the surface of a neutron star would be considerable.
- But creatures living there would not be made of proteins, so a comparison of perceived time is meaningless.
- Due to the extreme energies floating around at these temperatures, any life processes might proceed at a prodigious rate.

Physicist* Robert Forward wrote a science fiction novel speculating on the possibility of life on a neutron star: Dragon's Egg.
*His thesis was on detecting gravitational waves...

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Offline jeffreyH

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I recommend Dragon's Egg as a very good read.
Fixation on the Einstein papers is a good definition of OCD.

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Offline Alan McDougall

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A being living on a neutron star, at a temperature of millions of degrees would not see Earth at all - it would be shrouded in an impenetrable blackness at almost absolute zero.
- The time dilation on the surface of a neutron star would be considerable.
- But creatures living there would not be made of proteins, so a comparison of perceived time is meaningless.
- Due to the extreme energies floating around at these temperatures, any life processes might proceed at a prodigious rate.

Physicist* Robert Forward wrote a science fiction novel speculating on the possibility of life on a neutron star: Dragon's Egg.
*His thesis was on detecting gravitational waves...

I know that they would not be able see earth, which should have been obvious to you. It was a hypothetical question not based of any reality.

Thus, would the beings held in the huge gravity field of the neutron star, live at such a slow rate relative to us of earth that the might see us as entities moving at such a rate, that we would be a almost impossible to observe, flashing blurs of activity?


Likewise if we could do the reverse the process and observe them, would we, as an example, have to wait for a thousand , or more years,  before we see them take one step forward on its hypothetical legs?
The Truth remains the Truth regardless of our beliefs or opinions the Truth is always the Truth even if we know it or do not know it (The Truth remains the Truth)

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Offline evan_au

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they might see us as entities moving at such a rate, that we would be a almost impossible to observe, flashing blurs of activity?
General Relativity says that if you compared the speed of protein-based life near a neutron star with protein-based life on Earth, things on Earth would flash by. However, proteins are not stable on a neutron star.

Since life on a neutron star is pure speculation, anything is possible.
Dragon's Egg imagines creatures that are incredibly thin (due to the gravity) and extremely small (single cells visible under a microscope) and distorted in a North-South direction by the extreme magnetic field.

This novel imagines a lifetime lived far faster than human lifetimes, so that an entire civilization develops and creates space flight by the time a human spacecraft explores a small part of the neutron star. (Lifting a spacecraft off a neutron star would require technologies far beyond anything humans have built; we can barely get loads off the Earth.)

If you want to speculate, I recommend reading Dragon's Egg - written by someone who understands the physics (as far as anyone does).

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Offline jeffreyH

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And don't put your nose too near the glass. [;D]
Fixation on the Einstein papers is a good definition of OCD.