2k views

### Is a planets orbit really a straight line through curved spacetime? [duplicate]

My understanding is that general relativity concludes that gravity isn't real because it does not exist in all frames of reference. Also that mass and energy warp spacetime into a curved geometry. ...
566 views

### Is gravity a force? [duplicate]

If gravity just emerges from the curvature of spacetime, is it actually a force? Why is it one of the 4 fundamental forces of nature?
100 views

### Gravity as a fundamental force [duplicate]

In Dr.Einstein's theory of General Relativity-- he goes to great lengths to explain how the force of gravity is merely an illusion and in the case of the falling apple-- it is the earth accelerating ...
51 views

### Is there any such thing as gravity? [duplicate]

So I was seeing this documentary and ended up knowing that there is no such thing as gravity. It said that we are not being pulled by Earth but being pushed by the space time curvature acc. to general ...
49 views

### After all “Is the gravity a force or not?” [duplicate]

I see in some gifted physical texts great discovery that "The gravity is not a force, its manifest of spacetime curvature" And in others i see "the major problem of unifying the extra weak force of ...
35 views

### Why are we still considering gravity as one of four fundamental forces? [duplicate]

if gravity is just bending of spacetime according to general relativity why are we still considering it as one of the 4 fundamental forces. https://astronomy.stackexchange.com/q/12408/ this link ...
18k views

### If gravity isn't a force, then why do we learn in school that it is?

I have studied some of Einstein's Theory of General Relativity, and I understand that it states that gravity isn't a force but rather the effects of objects curving space-time. If this is true, then ...
46k views

### How exactly does gravity work?

The electromagnetic force and strong and weak forces require particles like photons and gluons. But in case of gravity there is no such particle found. Every mass bearing object creates a ...
9k views

### Why is gravity such a unique force?

My knowledge on this particular field of physics is very sketchy, but I frequently hear of a theoretical "graviton", the quantum of the gravitational field. So I guess most physicists' assumption is ...
4k views

### Can all fundamental forces be fictitious forces?

After reading many questions, like this and this, I wonder: Is it possible to consider the other fundamental forces too, the electroweak interaction and the strong interaction or ultimately the ...
2k views

### Why does gravity need to be quantised?

The electroweak and strong forces seem to be completely different types of forces to gravity. The latter is geometric while the former are not (as far as I'm aware!). So why should they all be ...
266 views

### Why shouldn't gravity be a force?

Why shouldn't gravity be a force? I am interested to know the reasons why we shouldn't treat gravity as a force in, for example, General Relativity. Won't we be able to model it accurately by ...
524 views

### Why to unify gravity with the other forces if gravity isn't really a force?

As I understand, the Theory of General Relativity says that the force of gravity doesn't exist. The planets move in elliptical orbits because the spacetime is curved by the mass of the sun, not ...