## What is space-time formula?

The unification of space and time into spacetime is based on the assumption that the speed of light, c c c, is the same everywhere. No matter where an observer is or what velocity they are moving at, they will always measure the speed of light to be c = 2.99 × 1 0 8 m/s c = 2.99 \times 10^{8} \text{m/s} c=2.

## What is space-time theory?

space-time, in physical science, single concept that recognizes the union of space and time, first proposed by the mathematician Hermann Minkowski in 1908 as a way to reformulate Albert Einstein’s special theory of relativity (1905).

**Does spacetime exist?**

In physics and, more generally, in the natural sciences, space and time are the foundation of all theories. Yet we never see spacetime directly. Rather we infer its existence from our everyday experience.

### Is 4th Dimension time?

Physics > Space and Time 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.

### How is 1 hour in space equal to 7 years on Earth?

The first planet they land on is close to a supermassive black hole, dubbed Gargantuan, whose gravitational pull causes massive waves on the planet that toss their spacecraft about. Its proximity to the black hole also causes an extreme time dilation, where one hour on the distant planet equals 7 years on Earth.

**How is time a 4th Dimension?**

Time’s dimension is a line going from the past to present to future. Thus, time as the fourth dimension locates an object’s position at a particular moment. The other dimensions allow you to move both ways. Hence, they separate time from spatial dimensions and call it a temporal dimension.

#### Does time create gravity?

Yes. Time causes gravity. Gravity is not a force, it is an effect of spacetime curvature.

#### What creates a white hole?

Black holes are created when stars, much more massive than our Sun, die catastrophically in a supernova. White holes are created when astrophysicists mathematically explore the environment around black holes, but pretend there’s no mass within the event horizon.

**What happens if you enter a white hole?**

No spacecraft will ever reach the region’s edge. Objects inside a white hole can leave and interact with the outside world, but since nothing can get in, the interior is cut off cut off from the universe’s past: No outside event will ever affect the inside.

https://www.youtube.com/c/pbsspacetime