Space and time are continuous meaning that for each of the coordinates and time, there exists points that are arbitrarily close to any point. Breaking the space-time continuum, as depicted in science fiction, is not currently possible according to our current understanding of physics.
In general relativity, you can't bend spacetime without a source of mass or energy. In the case of cosmic strings, this energy comes from the enormous amount of tension built into the cosmic string itself. It is, after all, pinching two regions of spacetime together.
According to Einstein's general relativity, it is impossible to tear the fabric of space.
If you were encircled by a rip, it would make you invisible. It would be the same as creating your own island universe. It is similar to what happens with a black hole. In an expanding universe, from the frame of the black hole, the outer universe between black holes is so thin as to almost be a rip.
While black holes are mysterious and exotic, they are also a key consequence of how gravity works: When a lot of mass gets compressed into a small enough space, the resulting object rips the very fabric of space and time, becoming what is called a singularity.
If enough mass is concentrated in a small enough region of spacetime, the spacetime curvature can become infinite. The pull of gravity in this case becomes so strong that nothing, not even light, can escape this region.
Although there is nothing in physics that says time must flow in a certain direction, scientists generally agree that time is a very real property of the Universe. Our science is thus based on the assumption that the laws of physics, and the passage of time, exist throughout the Universe.
A gravitational singularity, spacetime singularity or simply singularity is a condition in which gravity is predicted to be so intense that spacetime itself would break down catastrophically.
There are known to be solutions to the equations of general relativity that describe spacetimes which contain closed timelike curves, such as Gödel spacetime, but the physical plausibility of these solutions is uncertain. Many in the scientific community believe that backward time travel is highly unlikely.
The biggest lesson from Einstein's general theory of relativity is that space itself isn't a flat, unchanging, absolute entity. Rather it's woven together, along with time, into a single fabric: spacetime. This fabric is continuous, smooth, and gets curved and deformed by the presence of matter and energy.
Anything with mass—including your body—bends this four-dimensional cosmic grid. The warp, in turn, creates the effect of gravity, redirecting the path of objects that travel into it. The strength of gravity depends on the size of the space-time warp.
The world as we know it has three dimensions of space—length, width and depth—and one dimension of time. But there's the mind-bending possibility that many more dimensions exist out there. According to string theory, one of the leading physics model of the last half century, the universe operates with 10 dimensions.
Nowadays, when people talk about space-time, they often describe it as resembling a sheet of rubber. This, too, comes from Einstein, who realized as he developed his theory of general relativity (opens in new tab) that the force of gravity (opens in new tab) was due to curves in the fabric of space-time.
No. Experiments continue to show that there is no 'space' that stands apart from space-time itself... no arena in which matter, energy and gravity operate which is not affected by matter, energy and gravity.
Although many people are fascinated by the idea of changing the past or seeing the future before it's due, no person has ever demonstrated the kind of back-and-forth time travel seen in science fiction or proposed a method of sending a person through significant periods of time that wouldn't destroy them on the way.
There's a limit to how much of the universe we can see. The observable universe is finite in that it hasn't existed forever. It extends 46 billion light years in every direction from us.
The Second Law of Thermodynamics is the reason you can't go back to the past. The universe, like an unmixed cup of coffee, started in an extremely ordered state. Over time, the universe mixed together and became less ordered, like what happens when you stir the coffee. Going back in time is unmixing; it can't be done.
The time dilation on that planet—one hour equals 7 Earth years—seems extreme. To get that, you'd apparently need to be at the event horizon of a black hole. Yes. You can calculate where you must be to have that level of time dilation, and it's extreme.
According to Einstein , you need to describe where you are not only in three-dimensional space — length, width and height — but also in time. Time is the fourth dimension. So to know where you are, you have to know what time it is.
In the Discursive Condition, then, time is finite because it can exist only as a dimension of events and is not an infinite and neutral envelope for them.
on edge of Black Hole. Space and time are intertwined, called space-time, and gravity has the ability to stretch space-time. Objects with a large mass will be able to stretch space-time to the point where our perception of it changes, known as time dilation.
Stretching time
A clock near a black hole will tick very slowly compared to one on Earth. One year near a black hole could mean 80 years on Earth, as you may have seen illustrated in the movie Interstellar. In this way, black holes can be used to travel to the future.
In astrophysics, spaghettification is the tidal effect caused by strong gravitational fields. When falling towards a black hole, for example, an object is stretched in the direction of the black hole (and compressed perpendicular to it as it falls).
An event is represented by a set of coordinates x, y, z and t. Space time is thus four dimensional.
Why do physicists say that spacetime is doomed? Because, they argue, it has no operational meaning below the “Planck scale,” roughly 10-33 centimeters and 10-43 seconds. For instance, to measure the position of a subatomic particle with higher resolution, we must use radiation of smaller wavelength.