Does Space Need to Be Filled for Distance to Exist Between Two Objects?

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In summary, the conversation is about whether or not space needs to be filled. The person asking the question is struggling to sleep because of this topic. Another person responds by explaining that space is not a physical entity but rather a lack of things. They also mention virtual particles and zero point energy as related concepts. The original person thanks them for their response but also acknowledges that their question may be strange and asks for evidence to support the idea that space needs to be filled.
  • #1
nick1o2
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Something i need an awnser to! Its not homework just somehtign that has keeped me form sleeping for awhile.

But here's my view on it:

Space would need to be filled, so it can have a property fo distance bettween two thigns. Like if you had two planets netx to each other and youy take everyhting in the middle out so there is nothign doesn't that eman the two planets should be together toughing not apart?

Can soemone help me on this please? thanks.
 
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  • #2
Welcome to PF, Nick.
There really is no easy answer to your question. Space is not a thing... it's a lack of things. It doesn't need to be filled with anything, because its very nature is to not be filled with anything. When you get into virtual particles, zero point energy, etc., that's a whole different scene which I am not qualified to comment upon.
 
  • #3
Thankyou! :eek:
 
  • #4
You have a strange way of asking questions! Your question, in the title of this thread, is "Does space need to be filled?" but the main sentence in your post is the bald assertion "Space would need to be filled". If you believe that, why ask, and what evidence do you have that this is true?
 
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  • #5


There is no definitive answer to this question as it is a matter of perspective and interpretation. Some scientists believe that space is already filled with various forms of matter and energy, such as dark matter and radiation. Others argue that space is a vacuum and therefore cannot be "filled" in the traditional sense.

From a physics standpoint, space is considered to have properties such as distance and volume, regardless of whether it is filled with matter or not. The presence or absence of matter does not change these fundamental properties of space.

Furthermore, the idea that two planets should be touching if there is nothing in between them is not necessarily true. The force of gravity between two objects can hold them together without any physical contact.

In the end, the concept of whether space needs to be filled or not is a philosophical and scientific debate that has yet to be fully resolved. It is important to keep an open mind and continue exploring and learning about the mysteries of space.
 

Related to Does Space Need to Be Filled for Distance to Exist Between Two Objects?

1. What does it mean for space to be "filled"?

When people talk about space being "filled", they are usually referring to whether or not there is matter present in that particular area of space. Matter can include things such as gas, dust, and stars.

2. Why is it important to know if space is filled?

Understanding whether or not space is filled can help us to better understand the properties and behavior of the universe. It can also provide insights into the formation and evolution of galaxies and other astronomical objects.

3. How do scientists determine if space is filled?

Scientists use various tools and techniques, such as telescopes and spectroscopy, to study the properties of space and determine if it is filled with matter. They also use mathematical models and simulations to make predictions about the distribution of matter in space.

4. Is space ever completely empty?

While space may appear to be empty to the naked eye, it is never completely empty. There are always particles present, even in the vacuum of outer space. However, the density of these particles is incredibly low, making it seem empty to us.

5. What happens if space is filled?

If space is filled with matter, it can affect the movement and behavior of objects within it. This is because matter has mass and therefore exerts a gravitational force on other objects. The distribution of matter in space also plays a role in the expansion of the universe and the formation of structures such as galaxies and clusters of galaxies.

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