# Time a physical object?

#### Timescape

##### New Member
Time a physical object?

Hi, i am fairly new to this forum. You guys seem pretty smart...what do you think of time not being a physical object? You will notice there are absolutly no negatives in the universe. None at all. Temperature is the movement of atoms (which causes heat), and absolute zero is where the atoms have no movement at all. They cannot go into "Negative miles per secound". Time is similar. You may be able to advance in time, as we learned in Einstiens special THEORY of reletivity, but you couldn't come back. Because time is not a physical object to be traveled upon. It is a measurment???

#### Harte

##### Senior Member
Re: Time a physical object?

<div class='quotetop'>QUOTE(\"Timescape\")</div>
Hi, i am fairly new to this forum. You guys seem pretty smart...what do you think of time not being a physical object? You will notice there are absolutly no negatives in the universe. None at all. Temperature is the movement of atoms (which causes heat), and absolute zero is where the atoms have no movement at all. They cannot go into \"Negative miles per secound\". Time is similar. You may be able to advance in time, as we learned in Einstiens special THEORY of reletivity, but you couldn't come back. Because time is not a physical object to be traveled upon. It is a measurment???[/b]

Timescape,
In math, a negative number is only a positive number with a different direction attached to it. For example, -3 only means go 3 the other way. In the physical world negative only means the opposite of positive. There are two opposite types of electric charges we have named negative and positive. There is antimatter, sort of a negative matter. There are negative and positive quantities associated with what the quantum guys call the "spin" of a particle. As atoms cool, their temperature is headed in a negative direction. Cooling, thought of in terms of motion, can be called negative heating. In an arbitrary way we use negative and positive directions of movement every day. Going one way down a street, the address numbers decrease (the "negative" direction.) So negatives are found throughout nature.

As for the nature of time, there is no such entity as "Time." There is only a thing called "Spacetime." The two aspects of spacetime cannot be detached from each other, that is, space cannot exist without time and vice versa since they are two aspects of the same thing. If you are measuring space, you are measuring spacetime and if you are measuring time you are measuring spacetime.

Lastly, while special relativity doesn't show how to travel into the past, general relativity does predict travel into the past, though I don't know if Einstein ever realized this.