How did time start?

Question

How did time itself start,im not talking about a religious view.i mean a science point of view

Answer 1

the best idea we have is that it started in the instance of the big bang itself, as well as the expansion of the universe. because space and time are realted, as einstein said, as the universe expands, and space expands, time does as well.

Answer 2

In physics we speak of spacetime. This is the indivisible unity of space and time. For more infos you should read books about special or general relativity.

So time and space, or better spacetime was "born" together with the emergence of our universe (commonly referred to as "big bang"). Science can't tell (yet) what happened exactly or what the very first beginning exactly looked like. But one thing is pretty sure at the moment: There was no "before" the big bang because time came into existence with the big bang. Some newer theories that integrate quantum mechanics into the theory say that there might have been a "before" or that there wasn't exactly one "point" that marks the beginning of spacetime but rather an "interval". But all these theories are still very incomplete and don't have a definite form (yet).

The "point" of the beginning of spacetime in relativity is also known as a singularity. These singularities are a reliable sign in physics that something's wrong with a theory. That doesn't mean that the theory itself can't produce reliable results, but that in extreme situations (like the big bang) the theory can't make reliable predictions. The reason for this problem is that the physics of the very small (quantum mechanics) and the physics of the very big (relativiy, gravitation) can't be made compatible with the mathematical means we have at the moment. There are many attempts to cope with this proble, like quantum loop gravity, string theories etc. But still there's no working theory "of everything" available.

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Time and space are inseparably connected to each other as 4-dimensional spacetime. This consists of 3 space dimensions and 1 time dimension that's perpendicular to the space dimensions.

The distance we normally use looks like this:

ds² =  dx² + dy² + dz²

or

ds =  ÃƒÂ¢Ã‚ˆÂš(dx² + dy² + dz²)

s=distance

d = "take an infinitesimally small piece of".

That's the way we describe or calculate a length in a 3-dimensional space with the axes x, y, z. Time is treated separately from space. This is why in classical Galilieian physics the speed of light is seen as infinite.

Einstein's (and Maxwell's and other people's) works on special and general relativity have shown that the speed of light is not infinite and one of the results result is that the distance in spacetime looks different:

ds² =  c²dt² − dx² − dy² − dz²

or

ds =  ÃƒÂ¢Ã‚ˆÂš(c²dt² − dx² − dy² − dz²)

As you can see there are 4 axes: x, y, z and the new time-axis ct (speed of light*time) - it's ct because speed*time has the unit of length. The other difference is that only the time axis is positive and the three space axes are negative. This shows that time is not just another space dimension but behaves differently.

Because the space dimensions are negative in spacetime it can happen that you have to calculate the square root of a negative number. The result is a so-called imaginary number. If the term under the root is positive then two events can never influence each other because they're too far away from each other for light to travel the distance in a given time, if the term under the root is negative then light can travel beween two events in the given time and both events can influence each other.

Read an introductory book on special/general relativity. The topic is a bit too complicated to be explained in full detail here.

Wikipedia should also be a good start. It has more links on the topic you could try out.

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I can highly recommend the following books:

The road to Reality, by Roger Penrose (full of harcore mathematics, not easy to read)

The Elegant Universe, by Brian Greene (was also filmed as a TV show)

A Short History of Time, by Stephen Hawking (It's the simplest book of those in this list)

'Subtle is the Lord'...The Science and The Life of Albert Einstein, by Abraham Pais

The Matter Myth. Dramatic Discoveries that Challenge Our Understanding Of Physical Reality, by Paul Davies and John Gribbin

Schrödinger's Kitten and the Search for Reality, by John Gribbin

Time Travel in Einstein's Universe: The Physical Possibilities of Travel Through Time, by J. Richard Gott

Answer 3

we as spirits postulated time.

axiom 1. life is basically a static.

axiom 2. the static is capable of considerations, postulates and opinions.

axiom 3. space, energy, objects, form and time are the result of considerations made and/or agreed upon or not by the static, and are perceived solely because the static considers that it can perceive them.

axiom 7 time is basically a postulate that space and particles

will persist.

axiom 8. the apparency of time is the change of position of particles in space.

axiom 9.

change is the primary manifestation of time.

axiom 26. reality is the agreed-upon apparency of existence.

Answer 4

Allah, sent Adam and Eves in this world to live, basically since then time started but, counting system started later, it is variable nation to nation,

Answer 5

There are many pros and cons for the Big Bang theory, but try to imagine that maybe there is no "start" of anything. I mean: if lim (something)=0 it doesn't mean that (something) gets 0 ever.

Answer 6

The world exists in time and space.And both never started nor will ever end.Not even when the world ends.

Answer 7

Time is what keeps everything from happening all at once.  Time started when things started happening, this is also called the "big bang" by some people.

Answer 8

There is a scientific theory called "The Big Bang"

The Big Bang is the theory that the universe began by growing out from a single point about 13.7 billion years ago. Everything is now flying away, similar to the parts of a bomb. The theory is called the "Big Bang" because "bang" is the sound that a bomb makes. The point was very small, dense, and hot. All space, time, and matter was created when the point got bigger. Scientists that study cosmology, which is how the universe began and how it has developed, agree that this theory matches all the observations that we have made, but other theories do not.

Scientists base this theory on many observations. The most important is the redshift of very far away stars. When a star moves away from us, its light becomes more red and less blue, because of the Doppler effect. From this we can see that the stars are moving away from us. If we look at how fast they are moving, we see that they all started at one place about 13.7 billion years ago. Because most things become colder when they become bigger, the universe was also very hot when it started.

Other observations that support the Big Bang theory are the amounts of chemical elements, for example, hydrogen, helium, and lithium, and also the "cosmic microwave background radiation". The background radiation is radio waves that are everywhere in the universe. It is now very weak and cold, but a long time ago it was very strong and very hot.

As we go back in time towards the big bang, all the matter in the Universe gets closer together. Einstein's theory of general relativity says that the concentration of mass will increase the effect known as 'time dilation'. This means that the big bang was also the beginning of time itself. There was no 'before the big bang'.

Answer 9

Time in "our" Universe began in the Big Bang.  Prior to that, all of spacetime passed through a singularity.  There may be other regions of spacetime beyond and "before" the Big Bang, and there may be other Big Bangs---this is speculation.

Answer 10

it all started from a singularity, with big bang, which was the birth of our universe. and as u know time is the 4th dimension of our universe.

Answer 11

The best answer we have is that space and time began at the big bang.  The three dimensions of space and the one of time are the four dimensions of the visible Universe.

Answer 12

Time, as we know it, started, when man devised a way to measure it.  Time is simply a measurement, conceived by man, used to measure entropy, the natural decay of all matter.  So for all intents and purposes, time started when the very first particle(s) of matter were created and they started to decay.  It is commonly accepted that time started with the big bang, as that is the beginning of the expansion of the universe. However, it goes beyond that.