<p>Anything that has mass will have gravity ( Exhibit a phenomemon called gravitation) not just black holes. 
One way of understanding gravity was put forth by Newton as his law of gravitation. As @christo said, there is no clear knowledge of why it has gravity.</p>

<p>A more generic way to put it would be to say, anything that has mass curves the space around it. The force or gravity you would feel can be considered as the way you are being forced to follow the curved lines instead of your intended path. This is how Einstein's general theory of relativity explains gravitation. </p>

<p>In quantum mechanics, It is speculated that gravity is caused by exchanging particles called gravitons, think of it like the way you would play catch with your friends. Multiple objects having some mass throwing small balls called gravitons at each other. There is no evidence for the existence of gravitons yet, but it explains a lot of things in the quantum realm.</p>

CC BY-SA 3.0
2016-11-30T17:07:54.287Z
2016-11-30T17:07:54.287Z
Manikanta Dornala
<p>Any massive body (i.e., a body having mass) like the stars, planets, moons, and any atom in the universe have, what is called, a gravitational potential which results in its gravity.  This is described by <a href="https://en.wikipedia.org/wiki/Newton%27s_law_of_universal_gravitation" rel="noreferrer">Newton's Law of Gravity</a>. <em>Why</em> masses cause gravity, we do not know.  </p>

<p>So, in short, the earth's mass causes it to have gravity.</p>

CC BY-SA 3.0
2016-11-30T14:17:38.373Z
Than you for the edit, @AtmosphericPrisonEscape
Christo
CC BY-SA 3.0
2016-12-01T12:58:52.103Z
Well, learn something new!  TIL that definition number3 at Merriam-Webster is indeed exactly how you used it here :-)
Carl Witthoft
CC BY-SA 3.0
2016-11-30T13:44:24.300Z
2016-11-30T13:59:53.913Z
2016-11-30T13:59:53.913Z
Christo
<p>The earth is made from MANY particles, these particles get something called mass, from a thing called the higgs feild, this mass is how much gravity something has, the earth has its mass, and mass warps space time, like when you push your finger on your bed, it creates a curve that goes down, it happens for space, and things get attracted to earth.</p>
<p>The exciting thing is that everything has mass! Even us, but our mass, like some tens of KGs, are too small to create a gravitational pull, to pull other things, even just a centimeter away.</p>

CC BY-SA 4.0
2021-05-21T20:22:42.580Z
Welcome to astronomy SE, please make sure you follow the guidelines [ask].
B--rian
CC BY-SA 4.0
2021-05-21T19:42:50.477Z
2021-05-21T19:42:50.477Z
Programmer
<p>I've always wondered how our planet Earth or any other large spheroid-shaped thing in our universe has gravity? </p>

<p>Does it have a small black hole on its core causing it to have gravitational force?</p>

<p>Take our planet as an example: what causes it to have gravity?</p>

CC BY-SA 3.0
2016-11-30T20:01:35.930Z
Mass. Mass and a very small amount of energy to be more precise.
ProfRob
CC BY-SA 3.0
2016-11-30T20:32:30.883Z
Something worth noting: science never describes the true reason why something happens.  It concentrates on predicting the effects of what happens.  When one asks science "why," we answer by showing a deeper and more powerful model (such as Newtons' law of universal gravitation or Einstein's relativity).  If you want the "real" reason for gravity, turn to philosophy or religion.  They'll dare to try to answer such ontological questions.
Cort Ammon
CC BY-SA 3.0
2016-11-30T20:41:59.023Z
@RobJeffries: What "very small amount of energy" are you referring to?
Keith Thompson
CC BY-SA 3.0
2016-12-01T01:38:16.210Z
@KeithThompson Just taking a stab at this, but maybe rotational energy? The rotational energy would be a cause of [frame dragging](https://en.wikipedia.org/wiki/Frame-dragging) which helps to distort the space-time around the mass and as GR tells us, space-time distortion is gravity.
zephyr
CC BY-SA 3.0
2016-12-01T12:56:57.690Z
@RobJeffries are you just humorously referring to ground-state energy of particles at zero Kelvin?
Carl Witthoft
CC BY-SA 3.0
2016-12-01T13:33:25.070Z
Einstein's mass-energy equivalence law means that you can treat energy and mass as one and the same as far as general relativity is concerned. There is a better answer on this here http://physics.stackexchange.com/a/45887/105015
Dean
CC BY-SA 3.0
2016-12-01T16:50:18.943Z
The total mass-energy of the Earth is it's rest mass $\times c^2$ plus a negative term due to its potential energy plus a positive term due to the kinetic energy of its constituents. The latter two terms are tiny in comparison to the first. @KeithThompson
ProfRob
CC BY-SA 4.0
2021-05-19T17:25:43.957Z
Earth's mass is $5.97×10^{24}$ kg, its [gravitational binding energy](https://en.wikipedia.org/wiki/Gravitational_binding_energy) is $-2.49×10^{32}$ J, equivalent to $-2.77×10^{15}$ kg. (A ball with the mean density of the Earth and a radius just over 4.93 km would have that mass). So the Earth has roughly -1 g of binding energy per 2155 metric tons of rest mass.
PM 2Ring
<gravity><earth>
What causes the Earth to have gravity?
Jeffson
# What causes the Earth to have gravity?

(Asked by: username_0 on 2016-11-30)

I've always wondered how our planet Earth or any other large spheroid-shaped thing in our universe has gravity?

Does it have a small black hole on its core causing it to have gravitational force?

Take our planet as an example: what causes it to have gravity?

**Tags:** gravity, earth
> **Comments:**
> **username_1**: Mass. Mass and a very small amount of energy to be more precise.  
> **username_2**: Something worth noting: science never describes the true reason why something happens.  It concentrates on predicting the effects of what happens.  When one asks science "why," we answer by showing a deeper and more powerful model (such as Newtons' law of universal gravitation or Einstein's relativity).  If you want the "real" reason for gravity, turn to philosophy or religion.  They'll dare to try to answer such ontological questions.  
> **username_3**: @RobJeffries: What "very small amount of energy" are you referring to?  
> **username_4**: @KeithThompson Just taking a stab at this, but maybe rotational energy? The rotational energy would be a cause of [frame dragging](https://en.wikipedia.org/wiki/Frame-dragging) which helps to distort the space-time around the mass and as GR tells us, space-time distortion is gravity.  
> **username_5**: @RobJeffries are you just humorously referring to ground-state energy of particles at zero Kelvin?  
> **username_6**: Einstein's mass-energy equivalence law means that you can treat energy and mass as one and the same as far as general relativity is concerned. There is a better answer on this here http://physics.stackexchange.com/a/45887/105015  
> **username_1**: The total mass-energy of the Earth is it's rest mass $\times c^2$ plus a negative term due to its potential energy plus a positive term due to the kinetic energy of its constituents. The latter two terms are tiny in comparison to the first. @KeithThompson  
> **username_7**: Earth's mass is $5.97×10^{24}$ kg, its [gravitational binding energy](https://en.wikipedia.org/wiki/Gravitational_binding_energy) is $-2.49×10^{32}$ J, equivalent to $-2.77×10^{15}$ kg. (A ball with the mean density of the Earth and a radius just over 4.93 km would have that mass). So the Earth has roughly -1 g of binding energy per 2155 metric tons of rest mass.  

---

## 3 answers

### Answer by username_8 on 2016-11-30. Score: 9

Anything that has mass will have gravity ( Exhibit a phenomemon called gravitation) not just black holes.
One way of understanding gravity was put forth by Newton as his law of gravitation. As @christo said, there is no clear knowledge of why it has gravity.

A more generic way to put it would be to say, anything that has mass curves the space around it. The force or gravity you would feel can be considered as the way you are being forced to follow the curved lines instead of your intended path. This is how Einstein's general theory of relativity explains gravitation.

In quantum mechanics, It is speculated that gravity is caused by exchanging particles called gravitons, think of it like the way you would play catch with your friends. Multiple objects having some mass throwing small balls called gravitons at each other. There is no evidence for the existence of gravitons yet, but it explains a lot of things in the quantum realm.


---

### Answer by username_9 on 2016-11-30. Score: 9

Any massive body (i.e., a body having mass) like the stars, planets, moons, and any atom in the universe have, what is called, a gravitational potential which results in its gravity. This is described by [Newton's Law of Gravity](https://en.wikipedia.org/wiki/Newton%27s_law_of_universal_gravitation). *Why* masses cause gravity, we do not know.

So, in short, the earth's mass causes it to have gravity.

> **Comments:**
> **username_9**: Than you for the edit, @AtmosphericPrisonEscape  
> **username_5**: Well, learn something new!  TIL that definition number3 at Merriam-Webster is indeed exactly how you used it here :-)  

---

### Answer by username_10 on 2021-05-21. Score: -4

The earth is made from MANY particles, these particles get something called mass, from a thing called the higgs feild, this mass is how much gravity something has, the earth has its mass, and mass warps space time, like when you push your finger on your bed, it creates a curve that goes down, it happens for space, and things get attracted to earth.

The exciting thing is that everything has mass! Even us, but our mass, like some tens of KGs, are too small to create a gravitational pull, to pull other things, even just a centimeter away.

> **Comments:**
> **username_11**: Welcome to astronomy SE, please make sure you follow the guidelines [ask].  

---

