Dynamic Dark Energy

[hazelm]

All right.  I promised to review and report some confusing points about Gravitational Singularity.  I  have been trying all through this "normal" morning to get to it.  Now - hopefully - I shall.  But, first, let me give you this from today's Science Daily.  It just happens to relate to chapter three of the same bookazine as the singularity story:  Wonders of the Cosmos.

 

https://www.sciencedaily.com/releases/2017/10/171003111032.htm

 

"Astronomers found that the nature of dark energy may not be the cosmological constant introduced by Albert Einstein 100 years ago.    This is crucial for the study of dark energy."  (quote from Science Daily)  Their new term for dark energy is Dynamic Dark Energy.

 

By way of enrichment, the bookazine article lists three possible natures of dark energy:  Cosmological Constant (dark energy comes from space itself); Quintessence (dark energy is a field) and There is No Dark Energy (and gravity operates differently than we think on extremely large scales).

 

Now let's see what I can do elsewhere.

Edited October 4, 2017 by hazelm

[TomKalbfus]

What if gravity itself has mass, and it is negative? When you have a planet with gravity, in what direction is the gravity traveling? Does it not travel away from the planet at the speed of light with a point of origin being the massive body with which it originates? So lets say you step off a cliff and gravity is hitting you from down below at the speed of light With those gravitons hitting you at the speed of light, why don't they push you away instead of pulling you towards the ground? Possibly because they have negative inertia, because they are a negative form of energy. the mass of the gravity fields surrounding each object is the exact opposite of the object's themselves, so maybe gravity has its own gravity and that gravity is repulsive and it is pushing the Universe apart.

[hazelm]

What if gravity itself has mass, and it is negative? When you have a planet with gravity, in what direction is the gravity traveling? Does it not travel away from the planet at the speed of light with a point of origin being the massive body with which it originates? So lets say you step off a cliff and gravity is hitting you from down below at the speed of light With those gravitons hitting you at the speed of light, why don't they push you away instead of pulling you towards the ground? Possibly because they have negative inertia, because they are a negative form of energy. the mass of the gravity fields surrounding each object is the exact opposite of the object's themselves, so maybe gravity has its own gravity and that gravity is repulsive and it is pushing the Universe apart.

I, in my "innocence" have always felt gravity is not being given enough credit for what it does.  I cannot defend that stance; so, I just look forward to someone else doing it.  For now, isn't it a "push-pull" of energy and mass?    The small boy may push at the big bully but the big bully has more mass/energy.  So what happens if a lightweight ball rolls at the same speed as a heavyweight ball and they collide?  

 

The Leaning Tower experiment never worked for me.  So, I'll skip it.  Thanks.

 

Does gravity travel at the speed of light?

Edited October 5, 2017 by hazelm

[Vmedvil]

I, in my "innocence" have always felt gravity is not being given enough credit for what it does.  I cannot defend that stance; so, I just look forward to someone else doing it.  For now, isn't it a "push-pull" of energy and mass?    The small boy may push at the big bully but the big bully has more mass/energy.  So what happens if a lightweight ball rolls at the same speed as a heavyweight ball and they collide?  

 

The Leaning Tower experiment never worked for me.  So, I'll skip it.  Thanks.

 

Does gravity travel at the speed of light?

 

Gravity does travel at the speed of light just as all forces and No it does not have rest mass it has potential energy, but what Tom says about it having a negative field is true, it most resembles a negative charge's field and not a positive. 

 

 

This is not a negative form of energy direction does not make it negative, just opposite direction, just as we don't classify a negative charge's energy as negative and positive charge's energy as positive, the field potential is positive or negative causing a gain or loss of energy.

Edited October 7, 2017 by Vmedvil

[hazelm]

Gravity does travel at the speed of light just as all forces and No it does not have rest mass it has potential energy, but what Tom says about it having a negative field is true, it most resembles a negative charge's field and not a positive. 

 

 

This is not a negative form of energy direction does not make it negative, just opposite direction, just as we don't classify a negative charge's energy as negative and positive charge's energy as positive, the field potential is positive or negative causing a gain or loss of energy.

Thank you.

[TomKalbfus]

Thank you.

It is interesting that a force that pulls rather than pushes still has to originate from the particle or object that is doing the pulling. Gravity from the Sun is centered on the Sun and anything that causes a sudden change in the Sun's mass distribution creates a gravity way that propagates away from the Sun at the speed of light. When I throw a tennis ball at you and it hits you, you feel a push and not a pull. Very few objects that I can throw at you would exert a pull if they hit you.

[Vmedvil]

It is interesting that a force that pulls rather than pushes still has to originate from the particle or object that is doing the pulling. Gravity from the Sun is centered on the Sun and anything that causes a sudden change in the Sun's mass distribution creates a gravity way that propagates away from the Sun at the speed of light. When I throw a tennis ball at you and it hits you, you feel a push and not a pull. Very few objects that I can throw at you would exert a pull if they hit you.

 

That is because of kinetic energy or momentum not gravity, now gravity can increase kinetic energy and momentum on a object but it does not itself have these properties. The atoms of the object repel your atoms due to them wanting to stay in that state, but That is just how gravity works. 

Edited October 9, 2017 by Vmedvil

[LuigiA]

 

[TomKalbfus]

That is because of kinetic energy or momentum not gravity, now gravity can increase kinetic energy and momentum on a object but it does not itself have these properties. The atoms of the object repel your atoms due to them wanting to stay in that state, but That is just how gravity works. 

Interesting idea that something that moves does not have kinetic energy. Gravity moves at the speed of light, but when it hits you it pulls instead of pushing, it pulls in proportion to your mass and inversely proportional to your distance from the source of the gravity. Light on the other had pushes you when it hits. the push light exerts is proportional to its energy, gravity seems to work differently from this. Gravity seems to do nothing but convey information about the two masses involve and how much of a pull there should be. Most other forces have an energy force associated with them, magnetism pulls and pushes in proportion to the electric current generating the magnetic field, the nuclear strong and weak forces are proportional to their nuclear binding energy. And electric field is proportional to the amount of electric charge. Gravity is proportional to mass. I guess magnetism and electric fields both push and pull. The direction of motion doesn't always indicate the direction of force, which could be opposite and therefore a pull.

 

Now an interesting question is what happens if I throw a baseball with negative mass at you and it hits? If its momentum is proportional to mass, it should exert a pull on you in the direction of my throwing arm. You can get away with a lot of stuff if you could create negative matter and start throwing it around!